[MIPS64] add atomic-mips64

Supplied by Broadcom.

Change-Id: Ica8f4f6e713623e372a68e1dc11086ceb52516da
diff --git a/include/cutils/atomic-inline.h b/include/cutils/atomic-inline.h
index 4f90ef1..007a905 100644
--- a/include/cutils/atomic-inline.h
+++ b/include/cutils/atomic-inline.h
@@ -51,6 +51,8 @@
 #include <cutils/atomic-x86.h>
 #elif defined(__x86_64__)
 #include <cutils/atomic-x86_64.h>
+#elif defined(__mips64)
+#include <cutils/atomic-mips64.h>
 #elif defined(__mips__)
 #include <cutils/atomic-mips.h>
 #else