vgacon: dummy implementation for vgacon_text_force

This allows us to ditch a ton of ugly #ifdefs from a bunch of drm modeset
drivers.

v2: Make the dummy function actually return a sane value, spotted by
Ville.

v3: Because the patch is still in limbo there's no more drivers to
convert, noticed by Emil.

v4: Rebase once more, because hooray. I'll just go ahead an apply this
one later on to drm-misc.

Cc: Emil Velikov <emil.l.velikov@gmail.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/vmwgfx/vmwgfx_drv.c

@@ -1529,10 +1529,8 @@ static int __init vmwgfx_init(void)
 {
 	int ret;
 
-#ifdef CONFIG_VGA_CONSOLE
 	if (vgacon_text_force())
 		return -EINVAL;
-#endif
 
 	ret = drm_pci_init(&driver, &vmw_pci_driver);
 	if (ret)