Disable MMHUB PG for navi10 according to the production requirement.
Signed-off-by: NKenneth Feng <kenneth.feng@amd.com>
Reviewed-by: NHawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: NKevin Wang <kevin1.wang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>