videofe.cfg uses different vtsrc in rpi2
On rpi1 the vtsrc should be 2.
On rpi2 the vtsrc should be 3.
To fix this the install needs to know if this is rpi1 or rpi2. This can be done by looking at /media/mmcblk0p1/kernel7.img. If that's there then it's rpi2, otherwise it's rpi1.