staging: vboxvideo: Skip currrent crtc when updating crtcs

In vbox_crtc_set_base_and_mode() we update all the crtcs when the
single_framebuffer setting changes, including the one on which
vbox_crtc_set_base_and_mode() was called, so we end up doing
vbox_do_modeset() on it twice. This commit skips the crtc on which
we are updating in the loop to update the other crtcs.

This commit also removes the vbox_set_view() call from the loop,
vbox_set_view() does not depend on the single_framebuffer setting and it
was being called on the passed in crtc parameter and not on the crtci
local iterator value (typo), so it was a no-op already.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vboxvideo/vbox_mode.c

@@ -287,7 +287,8 @@ static int vbox_crtc_set_base_and_mode(struct drm_crtc *crtc,
 
 		list_for_each_entry(crtci, &vbox->dev->mode_config.crtc_list,
 				    head) {
-			vbox_set_view(crtc);
+			if (crtci == crtc)
+				continue;
 			vbox_do_modeset(crtci, &crtci->mode);
 		}
 	}