ARM MXC: Armadillo 500 add NOR flash device support (resend).

This patch add support for NOR flash mapping through the physmap driver.
The purpose is to maintain the original Atmark partition model.

Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>