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/npi_imx6ull.h b/include/configs/npi_imx6ull.h
index 4b47e4f..24d7b0c 100644
--- a/include/configs/npi_imx6ull.h
+++ b/include/configs/npi_imx6ull.h
@@ -13,7 +13,7 @@
 #define CFG_SYS_FSL_USDHC_NUM	1
 
 /* Console configs */
-#define CONFIG_MXC_UART_BASE		UART1_BASE
+#define CFG_MXC_UART_BASE		UART1_BASE
 
 /* MMC Configs */
 #define CFG_SYS_FSL_ESDHC_ADDR	USDHC2_BASE_ADDR