drm/amdgpu: add get_rom_offset callback for NBIO 6.3.2

Add the get_rom_offset callback to retrieve the VBIOS ROM offset
from REGS_ROM_OFFSET_CTRL for vbios imaging fetching from spirom.

Signed-off-by: Le Ma <le.ma@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Le Ma 2026-07-30 15:55:46 +08:00 • committed by Alex Deucher
commit 73a2a3b172