rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/cpu/mpc83xx/serdes.c b/cpu/mpc83xx/serdes.c
index 020c4c8..630b111 100644
--- a/cpu/mpc83xx/serdes.c
+++ b/cpu/mpc83xx/serdes.c
@@ -44,7 +44,7 @@
 
 void fsl_setup_serdes(u32 offset, char proto, char rfcks, char vdd)
 {
-	void *regs = (void *)CFG_IMMR + offset;
+	void *regs = (void *)CONFIG_SYS_IMMR + offset;
 	u32 tmp;
 
 	/* 1.0V corevdd */