OMAPDSS: picodlp: add missing #include <linux/module.h>

Compiling panel-picodlp.c failed with:

drivers/video/omap2/displays/panel-picodlp.c:560:12: error:
'THIS_MODULE' undeclared here (not in a function)

Add #include <linux/module.h> to get THIS_MODULE definition.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>