The header file is currently under plat-omap directory
under arch/omap. Move this out to an accessible place.

No Code changes done to the header file and renamed to timer-ti-dm.h.
Signed-off-by: NKeerthy <j-keerthy@ti.com>
Reviewed-by: NSebastian Reichel <sebastian.reichel@collabora.co.uk>
Tested-by: NLadislav Michl <ladis@linux-mips.org>
Signed-off-by: NTony Lindgren <tony@atomide.com>