1. check the firmware version when enabling gfxoff
2. overwrite the pptable to make sure gfxoff is really
enabled on navi10
Signed-off-by: NKenneth Feng <kenneth.feng@amd.com>
Reviewed-by: NHawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>