rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/cpu/mpc512x/speed.c b/cpu/mpc512x/speed.c
index e62477b..baf6215 100644
--- a/cpu/mpc512x/speed.c
+++ b/cpu/mpc512x/speed.c
@@ -62,13 +62,13 @@
 
 int get_clocks (void)
 {
-	volatile immap_t *im = (immap_t *) CFG_IMMR;
+	volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
 	u8 spmf;
 	u8 cpmf;
 	u8 sys_div;
 	u8 ips_div;
 	u8 pci_div;
-	u32 ref_clk = CFG_MPC512X_CLKIN;
+	u32 ref_clk = CONFIG_SYS_MPC512X_CLKIN;
 	u32 spll;
 	u32 sys_clk;
 	u32 core_clk;