fix 'for' loop problem (#376)

fix ‘for’ loop initial declarations are only allowed in c99 or c11 mode

kernel/sucompat.c

@@ -315,7 +315,8 @@ void ksu_sucompat_init()
 void ksu_sucompat_exit()
 {
 #ifdef CONFIG_KSU_KPROBES_HOOK
-	for (int i = 0; i < ARRAY_SIZE(su_kps); i++) {
+	int i;
+	for (i = 0; i < ARRAY_SIZE(su_kps); i++) {
 		destroy_kprobe(&su_kps[i]);
 	}
 #else