video: vmlfb: remove unnecessary pci_set_drvdata()

The driver core clears the driver data to NULL after device_release
or on probe failure. Thus, it is not needed to manually clear the
device driver data to NULL.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/vermilion/vermilion.c

@@ -383,7 +383,6 @@ static void vmlfb_disable_mmio(struct vml_par *par)
 static void vmlfb_release_devices(struct vml_par *par)
 {
 	if (atomic_dec_and_test(&par->refcount)) {
-		pci_set_drvdata(par->vdc, NULL);
 		pci_disable_device(par->gpu);
 		pci_disable_device(par->vdc);
 	}