armv7: use stdint.h in cache and MMU files

This makes it easier to copy + paste code into libpayload since
libpayload since both coreboot and libpayload have stdint.h and
it defines the types needed.

Change-Id: Ifa55f04a9bdddd17bc1a2679321a6744c75f25a8
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/2944
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/arch/armv7/lib/cache.c

@@ -31,7 +31,7 @@
  * Reference: ARM Architecture Reference Manual, ARMv7-A and ARMv7-R edition
  */
 
-#include <types.h>
+#include <stdint.h>
 
 #include <arch/cache.h>
 

src/arch/armv7/lib/mmu.c

@@ -28,7 +28,7 @@
  */
 
 #include <stdlib.h>
-#include <types.h>
+#include <stdint.h>
 
 #include <cbmem.h>
 #include <console/console.h>