This commit adds the core fbtft framework from
https://github.com/notro/fbtft.
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: NNoralf Tronnes <notro@tronnes.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>