spl: remove unnecessary (& ARM specific) include of asm/utils.h

ARM is the only architecture which includes this header and nothing in
spl_mmc.c makes use of it. Remove the include.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>

common/spl/spl_mmc.c

@@ -9,7 +9,6 @@
 #include <common.h>
 #include <spl.h>
 #include <asm/u-boot.h>
-#include <asm/utils.h>
 #include <mmc.h>
 #include <fat.h>
 #include <version.h>