mmc: Exit from mmc_init() if mmc_complete_init() fails

In case mmc_complete_init() returns error, exit from mmc_init()
without possibly calling cyclic_register(), which at that point
would be undesired.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 8d26738..47139e0 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -3073,8 +3073,10 @@
 
 	if (!err)
 		err = mmc_complete_init(mmc);
-	if (err)
+	if (err) {
 		pr_info("%s: %d, time %lu\n", __func__, err, get_timer(start));
+		return err;
+	}
 
 	if (CONFIG_IS_ENABLED(CYCLIC, (!mmc->cyclic.func), (NULL))) {
 		/* Register cyclic function for card detect polling */