Revert "kexec-hardboot: based on @Tasssadar https://github.com/Tasssadar/android_kernel_google_msm/commit/005cf387c1404eac862cc35153d7641d18faef4c"

This reverts commit 96605b97cb4620122b208b5cf1271b09e7912cf2.
Update to latest Toolchain