rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/lib_ppc/interrupts.c b/lib_ppc/interrupts.c
index c5951e9..f603170 100644
--- a/lib_ppc/interrupts.c
+++ b/lib_ppc/interrupts.c
@@ -40,8 +40,8 @@
 }
 #endif /* CONFIG_SHOW_ACTIVITY */
 
-#ifndef CFG_WATCHDOG_FREQ
-#define CFG_WATCHDOG_FREQ (CFG_HZ / 2)
+#ifndef CONFIG_SYS_WATCHDOG_FREQ
+#define CONFIG_SYS_WATCHDOG_FREQ (CONFIG_SYS_HZ / 2)
 #endif
 
 extern int interrupt_init_cpu (unsigned *);
@@ -124,7 +124,7 @@
 	timestamp++;
 
 #if defined(CONFIG_WATCHDOG) || defined (CONFIG_HW_WATCHDOG)
-	if ((timestamp % (CFG_WATCHDOG_FREQ)) == 0)
+	if ((timestamp % (CONFIG_SYS_WATCHDOG_FREQ)) == 0)
 		WATCHDOG_RESET ();
 #endif    /* CONFIG_WATCHDOG || CONFIG_HW_WATCHDOG */