Revert "fix build error to use 4.10 toolchain"

This reverts commit b00be1f288de2e4b19544bf49889819bcf1b72cd.
Revert "cpufreq: export the cpu load across cores to the policy struct. On Performance governor let's emulate a constant 100% load (in this Kernel's case it will make all cores online, which is kinda the purpose of a performance governor isn't it?)."

This reverts commit 990009c2ae2ddb0510e3f16db4f5f5f1be096f31.
Revert "cpufreq: Sync on thread migration optimizations"

This reverts commit c6d7c62993b4d163f40f1464bb1f0fb4bbea1c8c.

Conflicts:
	drivers/cpufreq/cpu-boost.c