Make libgcc wrappers arch-specific, add ARMv7

Change-Id: Ia0bbd3bec6588219ce24951c0bcebefc6b6ec80e
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/1940
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
diff --git a/src/lib/gcc.c b/src/lib/gcc.c
index 9b6ef03..daba427 100644
--- a/src/lib/gcc.c
+++ b/src/lib/gcc.c
@@ -22,10 +22,21 @@
  * compiler call specifies. Therefore we need a wrapper around those
  * functions. See gcc bug PR41055 for more information.
  */
+
+#if CONFIG_ARCH_X86
 #define WRAP_LIBGCC_CALL(type, name) \
 	type __real_##name(type a, type b) __attribute__((regparm(0))); \
 	type __wrap_##name(type a, type b); \
 	type __wrap_##name(type a, type b) { return __real_##name(a, b); }
+#elif CONFIG_ARCH_ARMV7
+#define WRAP_LIBGCC_CALL(type, name) \
+	type __real_##name(type a, type b); \
+	type __wrap_##name(type a, type b); \
+	type __wrap_##name(type a, type b) { return __real_##name(a, b); }
+#else
+#error Architecture unsupported.
+#endif
+
 
 WRAP_LIBGCC_CALL(long long, __divdi3)
 WRAP_LIBGCC_CALL(unsigned long long, __udivdi3)