Add xt925 and xt926 support

Adds support for Motorola Droid Razr Maxx HD (xt926) and Motorola Droid Razr HD (xt925)

Change-Id: Ic36b6bad83b2df731f8407b70e36284d7897fc21
Merge "Add xt925 and xt926 support" into jb4.2