Add support for DM646x SoC (a.k.a DaVinci HD) and its Evalution Module (EVM.) Original support done by Sudhakar Rajashekhara. Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>