For SRIOV VF, FB location is programmed by host driver, no need to
program it in guest driver.

v2: squash in unused variable removal
Signed-off-by: Zhigang Luo <Zhigang.Luo@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>