drm: remove DRM_GETSAREA and replace with drm_getsarea function

Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/mga_dma.c b/drivers/char/drm/mga_dma.c
index 5781a8d..769fee8 100644
--- a/drivers/char/drm/mga_dma.c
+++ b/drivers/char/drm/mga_dma.c
@@ -823,8 +823,7 @@
 	dev_priv->texture_offset = init->texture_offset[0];
 	dev_priv->texture_size = init->texture_size[0];
 
-	DRM_GETSAREA();
-
+	dev_priv->sarea = drm_getsarea(dev);
 	if (!dev_priv->sarea) {
 		DRM_ERROR("failed to find sarea!\n");
 		return DRM_ERR(EINVAL);