m7wls: use custom HTC RIL class

Change-Id: Ic3b6f1f5f90af6f51a671d6cbbfede7e08049ed3
Revert "m7wls: use custom HTC RIL class"

This reverts commit aef0254d900df1bc6645b2fdd78db5b5c52c5aeb

Change-Id: Icb8ac87ea153380e0c857d4df9bd4a767cfac83c
m7wls: remove duplicated overlay values

Change-Id: I4ff5e33def8f35b3e061a4c7dfb796238632aed5
m7: split device tree into m7ul, m7att, m7spr, m7tmo
m7spr: improve proprietary file handling
m7spr: convert from DOS line endings
m7spr: move network_mode overlay to m7-common/overlay-cdma
m7spr: add device guard
m7spr: override OTA assert
m7spr: allow m7wls devices

Change-Id: I01bdd1b69863c2210cc93e82b7057d45c9fad635
sprint rebase