ARM: mach-shmobile: mackerel: fixup memory initialize for zboot

Current makerel had issue which couldn't boot sometimes.
This patch fixup it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --cc arch/arm/mach-shmobile/include/mach/head-mackerel.txt
Simple merge