usb: host: ehci-tilegx: Remove redundant platform_set_drvdata()

Commit 0998d063 (device-core: Ensure drvdata = NULL when no
driver is bound) removes the need to set driver data field to
NULL.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/ehci-tilegx.c

@@ -193,7 +193,6 @@ static int ehci_hcd_tilegx_drv_remove(struct platform_device *pdev)
 	tilegx_stop_ehc();
 	gxio_usb_host_destroy(&pdata->usb_ctx);
 	destroy_irq(pdata->irq);
-	platform_set_drvdata(pdev, NULL);
 
 	return 0;
 }