drm: virtio: fix virtio_gpu_cursor_formats

When we use virtio-vga with a big-endian guest,
the mouse pointer disappears.

To fix that, on big-endian use DRM_FORMAT_BGRA8888
instead of DRM_FORMAT_ARGB8888.
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170405080915.823-1-lvivier@redhat.comSigned-off-by: Gerd Hoffmann <kraxel@redhat.com>

drivers/gpu/drm/virtio/virtgpu_plane.c

@@ -39,7 +39,11 @@ static const uint32_t virtio_gpu_formats[] = {
 };
 
 static const uint32_t virtio_gpu_cursor_formats[] = {
+#ifdef __BIG_ENDIAN
+	DRM_FORMAT_BGRA8888,
+#else
 	DRM_FORMAT_ARGB8888,
+#endif
 };
 
 uint32_t virtio_gpu_translate_format(uint32_t drm_fourcc)