xwiishow: use poll() instead of periodic polling
xwiishow: use poll() instead of periodic polling

Instead of polling the FDs periodically, we now use poll() to wait for
events.

Signed-off-by: David Herrmann <fb53b2ddb8d141e0cb39d7c67c2f81b6bc2eb0f7@gmail.com>

dvdhrm/xwiimote,dvdhrm/xwiimote,AdamLuchjenbroers/xwiimote,barracks510/xwiimote,barracks510/xwiimote,barracks510/xwiimote,AdamLuchjenbroers/xwiimote,barracks510/xwiimote