defconfig: enable xz compression

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
kbuild: drop cpuinit/cpuexit checks in modpost

With the removal of cpuinit/cpuexit we no longer need to
do section mismatch checks on these sections.

Drop it from modpost.

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>

Conflicts:
	scripts/mod/modpost.c
Defconfig enable xz compression
Makefile: adding config variable for Os/O2/O3 compilation

Conflicts:

	init/Kconfig

Conflicts:
	Makefile
Makefile: Added Snapdragon optimizations

Conflicts:

	Makefile

Conflicts:
	Makefile
Makefile: Optimizing build-options for linaro
adding one last linaro build flag

Conflicts:
	Makefile

Conflicts:
	Makefile