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/brppt2.h b/include/configs/brppt2.h
index 32d9f50..38c98c5 100644
--- a/include/configs/brppt2.h
+++ b/include/configs/brppt2.h
@@ -79,6 +79,6 @@
 #define CFG_SYS_INIT_RAM_SIZE	IRAM_SIZE
 
 /* USB Configs */
-#define CONFIG_MXC_USB_PORTSC		(PORT_PTS_UTMI | PORT_PTS_PTW)
+#define CFG_MXC_USB_PORTSC		(PORT_PTS_UTMI | PORT_PTS_PTW)
 
 #endif	/* __CONFIG_BRPP2_IMX6_H */