usb: musb: dsps: start OTG timer on resume again

Commit 468bcc2 ("usb: musb: dsps: kill OTG timer on suspend") stopped
the timer in suspend path but forgot the re-enable it in the resume
path. This patch fixes the behaviour.

Cc: <stable@vger.kernel.org> # v3.14+
Fixes 468bcc2 "usb: musb: dsps: kill OTG timer on suspend"
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/musb/musb_dsps.c

@@ -896,7 +896,9 @@ static int dsps_resume(struct device *dev)
 	dsps_writel(mbase, wrp->mode, glue->context.mode);
 	dsps_writel(mbase, wrp->tx_mode, glue->context.tx_mode);
 	dsps_writel(mbase, wrp->rx_mode, glue->context.rx_mode);
-	setup_timer(&glue->timer, otg_timer, (unsigned long) musb);
+	if (musb->xceiv->state == OTG_STATE_B_IDLE &&
+	    musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE)
+		mod_timer(&glue->timer, jiffies + wrp->poll_seconds * HZ);
 
 	return 0;
 }