usb: musb: dsps: Use dev_get_drvdata()

Using dev_get_drvdata directly.

Cc: Bin Liu <[e-mail]>
Cc: Greg Kroah-Hartman <[e-mail]>
Cc: [e-mail]
Signed-off-by: Kefeng Wang <[e-mail]>
Signed-off-by: Bin Liu <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/musb/musb_dsps.c

···
 static void dsps_musb_enable(struct musb *musb)
 {
 	struct device *dev = musb->controller;
-	struct platform_device *pdev = to_platform_device(dev->parent);
-	struct dsps_glue *glue = platform_get_drvdata(pdev);
+	struct dsps_glue *glue = dev_get_drvdata(dev->parent);
 	const struct dsps_musb_wrapper *wrp = glue->wrp;
 	void __iomem *reg_base = musb->ctrl_base;
 	u32 epmask, coremask;
···
 static void dsps_musb_disable(struct musb *musb)
 {
 	struct device *dev = musb->controller;
-	struct platform_device *pdev = to_platform_device(dev->parent);
-	struct dsps_glue *glue = platform_get_drvdata(pdev);
+	struct dsps_glue *glue = dev_get_drvdata(dev->parent);
 	const struct dsps_musb_wrapper *wrp = glue->wrp;
 	void __iomem *reg_base = musb->ctrl_base;