drm/amdgpu: bypass RLC init under sriov for Tonga (v2)

RLC will go wrong in soft_reset under sriov

Workaroound: only need to init RLC csb, and skip RLC stop, reset, start
    this is because host-driver has already done full initialization on RLC

v2: squash in build fix
Signed-off-by: Tiecehng Zhou <Tiecheng.Zhou@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c

@@ -4068,6 +4068,11 @@ static void gfx_v8_0_rlc_start(struct amdgpu_device *adev)
 
 static int gfx_v8_0_rlc_resume(struct amdgpu_device *adev)
 {
+	if (amdgpu_sriov_vf(adev)) {
+		gfx_v8_0_init_csb(adev);
+		return 0;
+	}
+
 	adev->gfx.rlc.funcs->stop(adev);
 	adev->gfx.rlc.funcs->reset(adev);
 	gfx_v8_0_init_pg(adev);