Fix compiler warnings for ARM systems.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/board/mpl/vcma9/flash.c b/board/mpl/vcma9/flash.c
index ccfe176..d15a191 100644
--- a/board/mpl/vcma9/flash.c
+++ b/board/mpl/vcma9/flash.c
@@ -290,7 +290,7 @@
  * Copy memory to flash
  */
 
-volatile static int write_hword (flash_info_t * info, ulong dest, ushort data)
+static int write_hword (flash_info_t * info, ulong dest, ushort data)
 {
 	vu_short *addr = (vu_short *) dest;
 	ushort result;