drm/client: Pass force parameter to client restore

drm/client: Pass force parameter to client restore

Add force parameter to client restore and pass value through the
layers. The only currently used value is false.

If force is true, the client should restore its display even if it
does not hold the DRM master lock. This is be required for emergency
output, such as sysrq.

While at it, inline drm_fb_helper_lastclose(), which is a trivial
wrapper around drm_fb_helper_restore_fbdev_mode_unlocked().

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patch.msgid.link/20251110154616.539328-2-tzimmermann@suse.de