d2/jf: add USE_CAMERA_STUB := false

For the lolz, it really doesn't do anything, but everyone else is
doing it and it used to be in our device tree where it doesn't belong

Change-Id: Iabde99c0876b68bd7313239d85ec154de13bfe8b
Merge pull request #260 from invisiblek/cm-10.2

d2/jf: add USE_CAMERA_STUB := false