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/xpress.h b/include/configs/xpress.h
index c8ae047..a2aa310 100644
--- a/include/configs/xpress.h
+++ b/include/configs/xpress.h
@@ -28,8 +28,8 @@
 /* Environment is in stored in the eMMC boot partition */
 
 /* USB Configs */
-#define CONFIG_MXC_USB_PORTSC		(PORT_PTS_UTMI | PORT_PTS_PTW)
-#define CONFIG_MXC_USB_FLAGS		0
+#define CFG_MXC_USB_PORTSC		(PORT_PTS_UTMI | PORT_PTS_PTW)
+#define CFG_MXC_USB_FLAGS		0
 
 #define CFG_FEC_ENET_DEV		0
 #define CFG_FEC_MXC_PHYADDR          0x0