bnxt_en: Add device IDs 0x1806 and 0x1752 for 57500 devices.

0x1806 and 0x1752 are VF variant and PF variant of the 57500 chip
family.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>