usb: musb: no need to access platform_device

dev_get_drvdata() is exactly the same as
platform_get_drvdata(). Drop that useless
access to the platform device.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/musb/musb_core.c

@@ -2286,9 +2286,8 @@ static void musb_restore_context(struct musb *musb)
 
 static int musb_suspend(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
+	struct musb	*musb = dev_to_musb(dev);
 	unsigned long	flags;
-	struct musb	*musb = dev_to_musb(&pdev->dev);
 
 	spin_lock_irqsave(&musb->lock, flags);
 
@@ -2310,8 +2309,7 @@ static int musb_suspend(struct device *dev)
 
 static int musb_resume_noirq(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct musb	*musb = dev_to_musb(&pdev->dev);
+	struct musb	*musb = dev_to_musb(dev);
 
 	musb_restore_context(musb);