global: Migrate CONFIG_USART_ID to CFG

Perform a simple rename of CONFIG_USART_ID to CFG_USART_ID

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/smartweb.h b/include/configs/smartweb.h
index f9a5aa9..75a1670 100644
--- a/include/configs/smartweb.h
+++ b/include/configs/smartweb.h
@@ -62,7 +62,7 @@
 
 /* serial console */
 #define CFG_USART_BASE		ATMEL_BASE_DBGU
-#define CONFIG_USART_ID			ATMEL_ID_SYS
+#define CFG_USART_ID			ATMEL_ID_SYS
 
 /* DFU class support */
 #define DFU_MANIFEST_POLL_TIMEOUT	25000