Revert "- correction of previous mod http://www.multiwii.com/forum/viewtopic.php?f=8&t=3635&start=10#p43916"

This reverts commit fe515d3ea8208aa674ad8e117e9d676edf89e0cd.
Revert "- brushed motors option on 32u4 proc at 1 / 2 / 4 / 8 / 16/ 32 /64 kHz"

This reverts commit 93681a426290b102ab926097d9d0333ac87d8f41.
def.h: fix motor spin and disable compass

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>