global: Migrate CONFIG_MXC_UART_BASE to CFG

Perform a simple rename of CONFIG_MXC_UART_BASE to CFG_MXC_UART_BASE

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/mx51evk.h b/include/configs/mx51evk.h
index 740e357..123b7a5 100644
--- a/include/configs/mx51evk.h
+++ b/include/configs/mx51evk.h
@@ -18,7 +18,7 @@
  * Hardware drivers
  */
 
-#define CONFIG_MXC_UART_BASE	UART1_BASE
+#define CFG_MXC_UART_BASE	UART1_BASE
 
 /* PMIC Controller */
 #define CFG_FSL_PMIC_BUS	0