Correct SPL uses of USB_MUSB_HOST

This converts 2 usages of this option to the non-SPL form, since there is
no SPL_USB_MUSB_HOST defined in Kconfig

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/usb/musb-new/omap2430.c b/drivers/usb/musb-new/omap2430.c
index 42e7abd..482dfdc 100644
--- a/drivers/usb/musb-new/omap2430.c
+++ b/drivers/usb/musb-new/omap2430.c
@@ -231,7 +231,7 @@
 
 	otg_board_data = &plat->otg_board_data;
 
-	if (CONFIG_IS_ENABLED(USB_MUSB_HOST)) {
+	if (IS_ENABLED(CONFIG_USB_MUSB_HOST)) {
 		struct musb_host_data *host = dev_get_priv(dev);
 		struct usb_bus_priv *priv = dev_get_uclass_priv(dev);