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/cm_fx6.h b/include/configs/cm_fx6.h
index 47b76c9..90ebec4 100644
--- a/include/configs/cm_fx6.h
+++ b/include/configs/cm_fx6.h
@@ -26,7 +26,7 @@
 #define CFG_SYS_INIT_RAM_SIZE	IRAM_SIZE
 
 /* Serial console */
-#define CONFIG_MXC_UART_BASE		UART4_BASE
+#define CFG_MXC_UART_BASE		UART4_BASE
 
 /* Environment */