mga: switch compat ioctls to drm_ioctl_kernel()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

drivers/gpu/drm/mga/mga_state.c

@@ -1005,7 +1005,7 @@ static int mga_dma_blit(struct drm_device *dev, void *data, struct drm_file *fil
 	return 0;
 }
 
-static int mga_getparam(struct drm_device *dev, void *data, struct drm_file *file_priv)
+int mga_getparam(struct drm_device *dev, void *data, struct drm_file *file_priv)
 {
 	drm_mga_private_t *dev_priv = dev->dev_private;
 	drm_mga_getparam_t *param = data;