switch debugfs to umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/mmc/card/mmc_test.c b/drivers/mmc/card/mmc_test.c
index b038c4a..e99bdc1 100644
--- a/drivers/mmc/card/mmc_test.c
+++ b/drivers/mmc/card/mmc_test.c
@@ -2949,7 +2949,7 @@
 }
 
 static int __mmc_test_register_dbgfs_file(struct mmc_card *card,
-	const char *name, mode_t mode, const struct file_operations *fops)
+	const char *name, umode_t mode, const struct file_operations *fops)
 {
 	struct dentry *file = NULL;
 	struct mmc_test_dbgfs_file *df;