liteSOM is a System On Module (http://grinn-global.com/litesom/). It
can't exists on its own, but will be used as part of other boards.
Hardware specification:
* NXP i.MX6UL processor
* 256M or 512M DDR3 memory
* optional eMMC (uSDHC2)
Here we treat SOM similar to SOC, so we place it inside arch/arm/mach-*
directory and make it possible to reuse initialization code (i.e. DDR,
eMMC init) for all boards that use it.
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
