mmc: Fixed warning in mmc.c

	The fix ported from U-Boot.2011

Change-Id: Id047d1f2874b16dbc945fadd6fcab966da795a46
Signed-off-by: Igor Patrik <igorp@marvell.com>
Reviewed-on: http://vgitil04.il.marvell.com:8080/2359
Reviewed-by: Omri Itach <omrii@marvell.com>
Tested-by: Omri Itach <omrii@marvell.com>
1 file changed