Revert "find7a: Enable Adreno RS driver"

This reverts commit 445e9ab6a94f5216b5eacc252851fa1710474b5c.

Conflicts:
	BoardConfig.mk

Change-Id: Ieac9dc09f3416439d48f33407898f05e79e9b667
find7a: Use vendor/lib for libril-qc-qmi

Change-Id: I604888bf9b376fc6200b64c197ddc557970e0c56
mkbootimg: Only include 8974pro DTS files

Change-Id: I05540cb440cf380380874c10dea3732356d5bdca
Rename find7a to FIND7 where it matters

This will allow stock firmwares to flash with recovery built from these trees.

Oppo is going to be doing unified builds - e.g. 7 and 7a will share a single
build.

Change-Id: I9e48cd0f994835fe8a20b77c8e026195abe4d65c