mmc: core: Silence compiler warning in __mmc_switch

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
index aae8d8b..e5b5eeb 100644
--- a/drivers/mmc/core/mmc_ops.c
+++ b/drivers/mmc/core/mmc_ops.c
@@ -414,7 +414,7 @@
 	int err;
 	struct mmc_command cmd = {0};
 	unsigned long timeout;
-	u32 status;
+	u32 status = 0;
 	bool ignore_crc = false;
 
 	BUG_ON(!card);