[3/3] su640: Make init script, fstab, and i_*.kl model specific items.

Model specific versions of init.iprj.rc, fstab.iprj, i_atnt-keypad.kl.

Change-Id: I747023b1b57398bf8910378d965412da2d087004

Get rid of keypad layout, it is not needed.

Change-Id: I747023b1b57398bf8910378d965412da2d087004
[3/3] su640: ro.product.camera, ro.telephony.ril.v3 are model specific.

Change-Id: I8fb08a357e8ad886a4d927257ba313b32fc74534