Revert "Makefile: Add Config Variable Os - O2 - O3 for choice Compilation"

This reverts commit f3943c6c0a429c4cd2d075b61995c4d194b87955.
Revert "Makefile: bye bye ccache"

This reverts commit e5a67030b5018ad26190abb765e849b5f44cebf9.
Revert "Makefile: Add CCACHE and FLAGS"

This reverts commit a8747a9872c5fc37b9234dde0754d95dcb1574d7.
Revert "Deoptimize test similar to Krait Kernel - Thanks Morfic"

This reverts commit d30b45ef3b7c58fe3153c077d43198e923ac6fb5.

Conflicts:
	arch/arm/Makefile
	arch/arm/boot/compressed/Makefile
Revert "Added optimized compiler flags."

This reverts commit fab0541278ca76288f8e278e4f371c732946582e.