msm8960: Commonize msm8960 and msm8960dt where possible

Change-Id: Ib720aff11c479f64e4b3f03856e1c37af886a7b9
msm8960: Use gps prebuits from N1

Change-Id: I7ffd6683e7ec2e3ddb3950aa1a8965e4b60dedd6