rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/cpu/74xx_7xx/cache.S b/cpu/74xx_7xx/cache.S
index 62a6683..66c7298 100644
--- a/cpu/74xx_7xx/cache.S
+++ b/cpu/74xx_7xx/cache.S
@@ -292,7 +292,7 @@
 	mtspr	HID0, r5		/* enable + invalidate */
 	mtspr	HID0, r3		/* enable */
 	sync
-#ifdef CFG_L2
+#ifdef CONFIG_SYS_L2
 	mflr	r5
 	bl	l2cache_enable		/* uses r3 and r4 */
 	sync
@@ -318,7 +318,7 @@
 	andc	r3, r3, r5		/* no enable, no invalidate */
 	mtspr	HID0, r3
 	sync
-#ifdef CFG_L2
+#ifdef CONFIG_SYS_L2
 	bl	l2cache_disable_no_flush /* uses r3 */
 #endif
 	mtlr	r4			/* restore link register */