arm: libpayload: Include stdint.h in cache.h

The cache.h header uses standard int types but doesn't include stdint.h itself.

Change-Id: If470978164b0cd1f05c27c2c8eda365133cc47ff
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/63190
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/4387
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

payloads/libpayload/include/armv7/arch/cache.h

@@ -32,6 +32,8 @@
 #ifndef ARMV7_CACHE_H
 #define ARMV7_CACHE_H
 
+#include <stdint.h>
+
 /* SCTLR bits */
 #define SCTLR_M		(1 << 0)	/* MMU enable			*/
 #define SCTLR_A		(1 << 1)	/* Alignment check enable	*/