mmc: it's safe to ignore mmc_send_if_cond() return value

Return value of mmc_send_if_cond() can be safely ignored (as it is
done in Linux). This makes older cards work with MXC MCI controller.

Signed-off-by: Ilya Yanok <yanok@emcraft.com>

drivers/mmc/mmc.c

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 7791c38..27116bf 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -867,10 +867,6 @@
 	/* Test for SD version 2 */
 	err = mmc_send_if_cond(mmc);
 
-	/* If we got an error other than timeout, we bail */
-	if (err && err != TIMEOUT)
-		return err;
-
 	/* Now try to get the SD card's operating condition */
 	err = sd_send_op_cond(mmc);