deconfig: enabled lz4 kernel compression
arm: lz4: faster boot-up process.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: engstk <eng.stk@sapo.pt>

Conflicts:

	arch/arm/boot/compressed/Makefile

Signed-off-by: engstk <eng.stk@sapo.pt>