This code is no longer used and can be removed as we
are using device tree.

Removing this code also removes a dependency between
drivers/mtd and arch/arm/mach-omap2 making furhter driver
changes easier.
Signed-off-by: NLadislav Michl <ladis@linux-mips.org>
[tony@atomide.com: removed from header too, updated comments]
Signed-off-by: NTony Lindgren <tony@atomide.com>