global: Migrate CONFIG_MXC_USB_FLAGS et al to CFG

Perform simple renames of:
   CONFIG_MXC_USB_FLAGS to CFG_MXC_USB_FLAGS
   CONFIG_MXC_USB_PORT to CFG_MXC_USB_PORT
   CONFIG_MXC_USB_PORTSC to CFG_MXC_USB_PORTSC

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/tbs2910.h b/include/configs/tbs2910.h
index 9b396e6..5358597 100644
--- a/include/configs/tbs2910.h
+++ b/include/configs/tbs2910.h
@@ -27,7 +27,7 @@
 
 /* USB */
 #ifdef CONFIG_CMD_USB
-#define CONFIG_MXC_USB_PORTSC		(PORT_PTS_UTMI | PORT_PTS_PTW)
+#define CFG_MXC_USB_PORTSC		(PORT_PTS_UTMI | PORT_PTS_PTW)
 #endif /* CONFIG_CMD_USB      */
 
 #define CFG_EXTRA_ENV_SETTINGS \