[om1] switch to om1 specific uboot

As the Petitboot that ships on the SPI of the Odroid M1 does not seem to be able to boot from extlinux.conf files, we can't use a generic image for this device.

So we need a device specific uboot on either eMMC or SD card to boot.

Signed-off-by: Dan Johansen <strit@manjaro.org>

devices/om1

@@ -2,7 +2,7 @@
 
 # Kernel and bootloader stuff
 linux-rc
-uboot-quartz64-a
+uboot-odroid-m1
 plymouth
 plymouth-theme-manjaro