initial G900 TW ramdisk

Change-Id: I48dfb022b710ce088daf4b375ccb1203f009c509
G900P: TW: add post-init.sh script to enable ec after boot-up

Change-Id: I1f53f73f22930688fad6a4a40a074f0194eb24d5
G900P: update TW ramdisk for use with ChronicKernel

Change-Id: Ied982dc355c85efc02ec80770db75c253a318cbf