drm/amdgpu: Clean up errors in amdgpu_virt.c

Fix the following errors reported by checkpatch:

ERROR: space required before the open parenthesis '('
Signed-off-by: Ran Sun <sunran001@208suo.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -520,7 +520,7 @@ static int amdgpu_virt_read_pf2vf_data(struct amdgpu_device *adev)
 			tmp = ((struct amd_sriov_msg_pf2vf_info *)pf2vf_info)->mm_bw_management[i].encode_max_frame_pixels;
 			adev->virt.encode_max_frame_pixels = max(tmp, adev->virt.encode_max_frame_pixels);
 		}
-		if((adev->virt.decode_max_dimension_pixels > 0) || (adev->virt.encode_max_dimension_pixels > 0))
+		if ((adev->virt.decode_max_dimension_pixels > 0) || (adev->virt.encode_max_dimension_pixels > 0))
 			adev->virt.is_mm_bw_enabled = true;
 
 		adev->unique_id =