ls990: de-commonize thermal-engine config

Change-Id: I7e76e0cbdd2398dd5b74366cf323e016dfe4db36
(cherry picked from commit ef784f103bd81d72ecb59f72aa0e766dc8384fc7)
ls990: bring in our variant-specific fstab

Change-Id: I090b520a8c66b017832b9a1896b7946c82287db6
(cherry picked from commit 9f9f12dedfaa4454dd6219682a68831c6d682f5e)
ls990: bump boot and recovery images

Change-Id: I4a4d7b3adc0f42fed786b9a3492be5980f924e85
(cherry picked from commit b24ad6651e24fbf98d4bceee75b326cb014fac49)
Merge "ls990: bring in our variant-specific fstab" into cm-11.0
Merge "ls990: bump boot and recovery images" into cm-11.0