Revert "drm/amdgpu: add modifiers in amdgpu_vkms_plane_init()"

This reverts commit 4046afce.

No need to support modifier in virtual kms, otherwise, in SRIOV
mode, when lanuching X server, set crtc will fail due to mismatch
between primary plane modifier and framebuffer modifier.
Signed-off-by: Guchun Chen <guchun.chen@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -391,7 +391,6 @@ static struct drm_plane *amdgpu_vkms_plane_init(struct drm_device *dev,
 						int index)
 {
 	struct drm_plane *plane;
-	uint64_t modifiers[] = {DRM_FORMAT_MOD_LINEAR, DRM_FORMAT_MOD_INVALID};
 	int ret;
 
 	plane = kzalloc(sizeof(*plane), GFP_KERNEL);
@@ -402,7 +401,7 @@ static struct drm_plane *amdgpu_vkms_plane_init(struct drm_device *dev,
 				       &amdgpu_vkms_plane_funcs,
 				       amdgpu_vkms_formats,
 				       ARRAY_SIZE(amdgpu_vkms_formats),
-				       modifiers, type, NULL);
+				       NULL, type, NULL);
 	if (ret) {
 		kfree(plane);
 		return ERR_PTR(ret);