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/mx6ul_14x14_evk.h b/include/configs/mx6ul_14x14_evk.h
index 3f8a90b..635ae78 100644
--- a/include/configs/mx6ul_14x14_evk.h
+++ b/include/configs/mx6ul_14x14_evk.h
@@ -116,8 +116,8 @@
 
 /* USB Configs */
 #ifdef CONFIG_CMD_USB
-#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
 #endif
 
 #ifdef CONFIG_CMD_NET