Remove old modules before installing new ones
Remove old modules before installing new ones

See: https://github.com/Hexxeh/rpi-update/issues/106

JackDanger/rpi-update,lurch/rpi-update,shrx/rpi-update,shaun10/rpi-update,c0d3z3r0/rock-update,TwizzyDizzy/rpi-update,vinodpanicker/rpi-update,Hexxeh/rpi-update