Remove vendorsteup

Change-Id: I4dc53b9ab891c22f54cac4054f90b740f99f5d5d
Remove if-exists from vendor as the build wouldn't boot

Change-Id: Ie6b5bc102b5081bea6d4684a3c768c9c314032fa
Merge branch 'cm-10.2' of https://github.com/CyanogenMod/android_device_motorola_xt897c into jb3
Adjustments to match official CM 10.2