drm/amdgpu: Disable GPU reset on SRIOV before remove pci.

The recent change brought a bug on SRIOV envrionment. It caused
unloading amdgpu failed on Guest VM. The reason is that the VF
FLR was requested while unloading amdgpu driver, but the VF FLR
of SRIOV sequence is wrong while removing PCI device.

For SRIOV, the guest driver should not trigger the whole XGMI hive
to do the reset. Host driver control how the device been reset.

Fixes: f5c7e779 ("drm/amdgpu: Adjust removal control flow for smu v13_0_2")
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Shaoyun Liu <Shaoyun.Liu@amd.com>
Signed-off-by: Gavin Wan <Gavin.Wan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>