[ARM] 5354/1: mach-pxa: add AM300 platform driver v3

This patch adds support for the AM300 platform driver which uses the
E-Ink broadsheetfb display driver.

Cc: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Jaya Kumar <jayakumar.lkml@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>