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/taurus.h b/include/configs/taurus.h
index 88870d6..174b848 100644
--- a/include/configs/taurus.h
+++ b/include/configs/taurus.h
@@ -35,7 +35,7 @@
 /* Misc CPU related */
 
 #define CFG_USART_BASE		ATMEL_BASE_DBGU
-#define CONFIG_USART_ID			ATMEL_ID_SYS
+#define CFG_USART_ID			ATMEL_ID_SYS
 
 /*
  * SDRAM: 1 bank, min 32, max 128 MB