Revert "Msm8660: Set a default toolchain"

This reverts commit 99af696f7e9ee3eb039e3b1e39a746970dade917.

Change-Id: I8ecfeda50c33e8ea49b5d5f12833e63be447dd5e
Merge "Revert "Msm8660: Set a default toolchain"" into kk4.4