ppc/amigaone: Implement NVRAM emulation

The board has a battery backed NVRAM where U-Boot environment is
stored which is also accessed by AmigaOS and e.g. C:NVGetVar command
crashes without it having at least a valid checksum.

[npiggin: 32-bit compile fix]
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Message-ID: <7e4c0107ef6bdc2b20fb1e780a188275c7dc1e49.1740673173.git.balaton@eik.bme.hu>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
1 file changed