mode_t whack-a-mole: chelsio

it's umode_t, damnit...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.h

@@ -40,7 +40,7 @@
 struct t4_debugfs_entry {
 	const char *name;
 	const struct file_operations *ops;
-	mode_t mode;
+	umode_t mode;
 	unsigned char data;
 };