staging: drm/omap: Use ERR_CAST inlined function instead of ERR_PTR(PTR_ERR(..

The semantic patch that makes this change is available
in scripts/coccinelle/api/err_cast.cocci.

More information about semantic patching is available at
http://coccinelle.lip6.fr/Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/omapdrm/omap_gem_helpers.c

@@ -84,7 +84,7 @@ struct page ** _drm_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask)
 		page_cache_release(pages[i]);
 	}
 	drm_free_large(pages);
-	return ERR_PTR(PTR_ERR(p));
+	return ERR_CAST(p);
 }
 
 /**