[ARM] pxa/z2: fix flash layout to final version

This patch fixes flash layout to it's final version. Also, I fixed the
authorship information of this file as it's been totally reworked since Ken
released his last version.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>