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/drivers/usb/host/ehci-mx5.c b/drivers/usb/host/ehci-mx5.c
index 964a53b..c112798 100644
--- a/drivers/usb/host/ehci-mx5.c
+++ b/drivers/usb/host/ehci-mx5.c
@@ -299,10 +299,10 @@
 			HC_LENGTH(ehci_readl(&(hccr)->cr_capbase)));
 	setbits_le32(&ehci->usbmode, CM_HOST);
 
-	__raw_writel(CONFIG_MXC_USB_PORTSC, &ehci->portsc);
+	__raw_writel(CFG_MXC_USB_PORTSC, &ehci->portsc);
 	setbits_le32(&ehci->portsc, USB_EN);
 
-	mxc_set_usbcontrol(priv->portnr, CONFIG_MXC_USB_FLAGS);
+	mxc_set_usbcontrol(priv->portnr, CFG_MXC_USB_FLAGS);
 	mdelay(10);
 
 	return ehci_register(dev, hccr, hcor, &mx5_ehci_ops, 0,