musb_hdrc: Fix clock usage for suspend

At least tusb implements set_clock(), and in that
case clk_disable() gets called twice. Do not call
clk_disable() if set_clock() is implemented.
Signed-off-by: Tony Lindgren <tony@atomide.com>

drivers/usb/musb/plat_uds.c

@@ -2120,6 +2120,9 @@ static int musb_suspend(struct platform_device *pdev, pm_message_t message)
 		 */
 	}
 
+	if (musb->set_clock)
+		musb->set_clock(musb->clock, 0);
+	else
 		clk_disable(musb->clock);
 	spin_unlock_irqrestore(&musb->Lock, flags);
 	return 0;
@@ -2134,7 +2137,12 @@ static int musb_resume(struct platform_device *pdev)
 		return 0;
 
 	spin_lock_irqsave(&musb->Lock, flags);
+
+	if (musb->set_clock)
+		musb->set_clock(musb->clock, 1);
+	else
 		clk_enable(musb->clock);
+
 	/* for static cmos like DaVinci, register values were preserved
 	 * unless for some reason the whole soc powered down and we're
 	 * not treating that as a whole-system restart (e.g. swsusp)