drm/fb-helper: Fix fb refcounting in pan_display_atomic
drm/fb-helper: Fix fb refcounting in pan_display_atomic

In

commit bbb1e52402b2a288b09ae37e8182599931c7e9df
Author: Rob Clark <915c10c999604870200b6defbe633d857c856ca0@gmail.com>
Date:   Tue Aug 25 15:35:58 2015 -0400

    drm/fb-helper: atomic restore_fbdev_mode()..

we've forgotten to do the plane->old_fb refcount dance for
pan_display_atomic, which can result in refcount leaks if the current
configuration is not from fbcon. Which apparently can happen when
vt-switching - fbcon does a pan first before a set_par.

OCD-align function parameters while at it.

v2: Actually git add the OCD.

Cc: Rob Clark <915c10c999604870200b6defbe633d857c856ca0@gmail.com>
Cc: Rodrigo Vivi <f714145d6ee82178e54021e0c168f56d17b53c9c@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92483
Signed-off-by: Daniel Vetter <c1b6782c4af8f0673da8923a0702a1832e5940f4@intel.com>
Link: 1d0548b715b4d41f613b6dc1c216abe1870a5ecb@ffwll.ch
Tested-by: Rodrigo Vivi <f714145d6ee82178e54021e0c168f56d17b53c9c@intel.com>
Reviewed-by: Rob Clark <915c10c999604870200b6defbe633d857c856ca0@gmail.com>
Signed-off-by: Daniel Vetter <c1b6782c4af8f0673da8923a0702a1832e5940f4@ffwll.ch>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs