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/verdin-imx8mm.h b/include/configs/verdin-imx8mm.h
index 27d7efb..8cb1f1a 100644
--- a/include/configs/verdin-imx8mm.h
+++ b/include/configs/verdin-imx8mm.h
@@ -67,6 +67,6 @@
 #define PHYS_SDRAM_SIZE			SZ_2G /* 2GB DDR */
 
 /* 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 /* __VERDIN_IMX8MM_H */