Revert "Set CONFIG_HZ=256"

This reverts commit 6bb9e87d18b7fa70a3c5458e87ef7359bde936db.
Revert "Increase DEFAULT_MMAP_MIN_ADDR value from 4096 to 8192"

This reverts commit c9339125ed1bd5f6655bfc6324930a0bd6b79d66.

Conflicts:

	arch/arm/configs/air_defconfig
acpuclock-8064.c: Disable some frequency
Signed-off-by: Seongmin Park <r_data@naver.com>
Use ccache so that it recompiles faster after a make clean.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>

Conflicts:

	Makefile
Update #1 - 03122013
Signed-off-by: Seongmin Park <r_data@naver.com>