drm/nouveau: fix bogus GPL-2 license header

The bulk SPDX addition made all these files into GPL-2.0 licensed files.
However the remainder of the project is MIT-licensed, these files
were simply missing the boiler plate and got caught up in the global update.

Fixes: 96ac6d43 (treewide: Add SPDX license identifier - Kbuild)
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 ccflags-y += -I $(srctree)/$(src)/include
 ccflags-y += -I $(srctree)/$(src)/include/nvkm
 ccflags-y += -I $(srctree)/$(src)/nvkm

drivers/gpu/drm/nouveau/dispnv04/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nouveau-y += dispnv04/arb.o
 nouveau-y += dispnv04/crtc.o
 nouveau-y += dispnv04/cursor.o

drivers/gpu/drm/nouveau/dispnv50/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nouveau-y += dispnv50/disp.o
 nouveau-y += dispnv50/lut.o
 

drivers/gpu/drm/nouveau/nvif/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nvif-y := nvif/object.o
 nvif-y += nvif/client.o
 nvif-y += nvif/device.o

drivers/gpu/drm/nouveau/nvkm/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 include $(src)/nvkm/core/Kbuild
 include $(src)/nvkm/falcon/Kbuild
 include $(src)/nvkm/subdev/Kbuild

drivers/gpu/drm/nouveau/nvkm/core/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nvkm-y := nvkm/core/client.o
 nvkm-y += nvkm/core/engine.o
 nvkm-y += nvkm/core/enum.o

drivers/gpu/drm/nouveau/nvkm/engine/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nvkm-y += nvkm/engine/falcon.o
 nvkm-y += nvkm/engine/xtensa.o
 

drivers/gpu/drm/nouveau/nvkm/engine/bsp/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nvkm-y += nvkm/engine/bsp/g84.o

drivers/gpu/drm/nouveau/nvkm/engine/ce/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nvkm-y += nvkm/engine/ce/gt215.o
 nvkm-y += nvkm/engine/ce/gf100.o
 nvkm-y += nvkm/engine/ce/gk104.o

drivers/gpu/drm/nouveau/nvkm/engine/cipher/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nvkm-y += nvkm/engine/cipher/g84.o

drivers/gpu/drm/nouveau/nvkm/engine/device/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nvkm-y += nvkm/engine/device/acpi.o
 nvkm-y += nvkm/engine/device/base.o
 nvkm-y += nvkm/engine/device/ctrl.o

drivers/gpu/drm/nouveau/nvkm/engine/disp/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nvkm-y += nvkm/engine/disp/base.o
 nvkm-y += nvkm/engine/disp/nv04.o
 nvkm-y += nvkm/engine/disp/nv50.o

drivers/gpu/drm/nouveau/nvkm/engine/dma/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nvkm-y += nvkm/engine/dma/base.o
 nvkm-y += nvkm/engine/dma/nv04.o
 nvkm-y += nvkm/engine/dma/nv50.o

drivers/gpu/drm/nouveau/nvkm/engine/fifo/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nvkm-y += nvkm/engine/fifo/base.o
 nvkm-y += nvkm/engine/fifo/nv04.o
 nvkm-y += nvkm/engine/fifo/nv10.o

drivers/gpu/drm/nouveau/nvkm/engine/gr/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nvkm-y += nvkm/engine/gr/base.o
 nvkm-y += nvkm/engine/gr/nv04.o
 nvkm-y += nvkm/engine/gr/nv10.o

drivers/gpu/drm/nouveau/nvkm/engine/mpeg/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nvkm-y += nvkm/engine/mpeg/nv31.o
 nvkm-y += nvkm/engine/mpeg/nv40.o
 nvkm-y += nvkm/engine/mpeg/nv44.o

drivers/gpu/drm/nouveau/nvkm/engine/msenc/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 #nvkm-y += nvkm/engine/msenc/base.o

drivers/gpu/drm/nouveau/nvkm/engine/mspdec/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nvkm-y += nvkm/engine/mspdec/base.o
 nvkm-y += nvkm/engine/mspdec/g98.o
 nvkm-y += nvkm/engine/mspdec/gt215.o

drivers/gpu/drm/nouveau/nvkm/engine/msppp/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nvkm-y += nvkm/engine/msppp/base.o
 nvkm-y += nvkm/engine/msppp/g98.o
 nvkm-y += nvkm/engine/msppp/gt215.o

drivers/gpu/drm/nouveau/nvkm/engine/msvld/Kbuild

-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nvkm-y += nvkm/engine/msvld/base.o
 nvkm-y += nvkm/engine/msvld/g98.o
 nvkm-y += nvkm/engine/msvld/gt215.o