linux-phytec-ti

drm/tidss: WB: remove unnecessary kernel trace

Remove unneeded kernel trace when reserving an overlay for wite-back.
Also since dispc7_wb_find_free_ovr() was not really returning anything
changed its signature to void instead of int.

Signed-off-by: Benoit Parrot <bparrot@ti.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>