drm/amdgpu: Skip program gfxhub_v3_0_3 system aperture registers under SRIOV

[Why]
gfxhub_v3_0_3 system aperture registers are removed from RLCG register access range.

[How]
Skip access gfxhub_v3_0_3 system aperture registers under SRIOV VF.
These registers will be programmed on host side.
Signed-off-by: Yifan Zha <Yifan.Zha@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfxhub_v3_0_3.c

@@ -154,6 +154,9 @@ static void gfxhub_v3_0_3_init_system_aperture_regs(struct amdgpu_device *adev)
 {
 	uint64_t value;
 
+	if (amdgpu_sriov_vf(adev))
+		return;
+
 	/* Disable AGP. */
 	WREG32_SOC15(GC, 0, regGCMC_VM_AGP_BASE, 0);
 	WREG32_SOC15(GC, 0, regGCMC_VM_AGP_TOP, 0);