The OpenMesh MR900 and to-be-added MR1750 family are very similar.
Make the existing MR900 DTSI more general so it can be used for
the MR1750 devices as well.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Signed-off-by: maurerr <mariusd84@gmail.com>