gxt4500: enable panning

The driver implements pan_display but the corresponding flags are not set.

Add FBINFO_HWACCEL_XPAN and FBINFO_HWACCEL_YPAN to flags to allow HW
accelerated panning (for fast scrolling).

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/fbdev/gxt4500.c

@@ -685,7 +685,8 @@ static int gxt4500_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 #endif
 
 	info->fbops = &gxt4500_ops;
-	info->flags = FBINFO_FLAG_DEFAULT;
+	info->flags = FBINFO_FLAG_DEFAULT | FBINFO_HWACCEL_XPAN |
+					    FBINFO_HWACCEL_YPAN;
 
 	err = fb_alloc_cmap(&info->cmap, 256, 0);
 	if (err) {