drm/amdgpu: support full gpu reset workflow when ras err_event_athub occurs

This athub fatal error can be recovered by baco without system-level reboot,
so add a mode to use baco for the recovery. Not affect the default psp reset
situations for now.

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>