Heat dissipation with GPIO

[francoisjacques]

Triggering BT discovery through GPIO is nifty, but I've found that having this enabled makes the pi run very hot for little use.

Until there's another way not involving eager polling, I think that by default it should perhaps be disabled? Whoever wants to tinker with GPIO should have all the knowledge to change the config file.

EDIT: changing the vitadock.conf from

DISCOVERY_KEY_GPIO=5

to

# DISCOVERY_KEY_GPIO=5