mmc_spi: add mmc_init call

As Andy Fleming suggested, we can call mmc_init() in mmc_spi command.
So that we don't need to run mmcinfo command next.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>

common/cmd_mmc_spi.c

diff --git a/common/cmd_mmc_spi.c b/common/cmd_mmc_spi.c
index 63fe313..cfd0fb1 100644
--- a/common/cmd_mmc_spi.c
+++ b/common/cmd_mmc_spi.c
@@ -74,6 +74,7 @@
 	}
 	printf("%s: %d at %u:%u hz %u mode %u\n", mmc->name, mmc->block_dev.dev,
 	       bus, cs, speed, mode);
+	mmc_init(mmc);
 	return 0;
 
 usage: