viafb: restore display on resume

This patch makes viafb restore the display on resume by calling
viafb_set_par. Resumeing has still its issues:
- will probably freeze most machines (for me on VX800 reliable on the
  second resume)
- under some configurations the screen appears on the wrong output
  device (reason unknown)
Signed-off-by: NFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>
Acked-by: NJonathan Corbet <corbet@lwn.net>
Cc: Joseph Chan <JosephChan@via.com.tw>

drivers/video/via/viafbdev.c

@@ -1705,6 +1705,9 @@ int viafb_resume(struct pci_dev *pdev)
 		    viaparinfo->shared->saved_regs,
 		    0x100 * sizeof(u32));
 
+	viafb_set_par(viafbinfo);
+	if (viafb_dual_fb)
+		viafb_set_par(viafbinfo1);
 	fb_set_suspend(viafbinfo, 0);
 
 fail: