usb: musb-new: Fix improper musb host pointer

When MUSB is operating in peripheral mode, probe registering
musb core using musb_register which intern return int value
for validation. so there is no scope to preserve struct musb
pointer but the same can be used in .remove musb_stop.
So fix this by return musb_register with struct musb pointer.

Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Purna Chandra Mandal <purna.mandal@microchip.com>
Tested-by: Chen-Yu Tsai <wens@csie.org> # A33-OlinuXino
Tested-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/drivers/usb/musb-new/pic32.c b/drivers/usb/musb-new/pic32.c
index f04719d..3a19900 100644
--- a/drivers/usb/musb-new/pic32.c
+++ b/drivers/usb/musb-new/pic32.c
@@ -251,9 +251,11 @@
 	ret = musb_lowlevel_init(mdata);
 #else
 	pic32_musb_plat.mode = MUSB_PERIPHERAL;
-	ret = musb_register(&pic32_musb_plat, &pdata->dev, mregs);
+	mdata->host = musb_register(&pic32_musb_plat, &pdata->dev, mregs);
+	if (!mdata->host)
+		return -EIO;
 #endif
-	if (ret == 0)
+	if ((ret == 0) && mdata->host)
 		printf("PIC32 MUSB OTG\n");
 
 	return ret;