drivers/staging/fbtft/fb_seps525: New driver for SEPS525 (Syncoam) LCD Controllers

The SEPS525 is a 160 RGB x 128 Dots, 262K Colors PM-OLED Display Driver and
Controller.

The controller can be found on the NHD-1.69-160128UGC3
(Newhaven Display International, Inc.).

Datasheets:
Link: https://www.newhavendisplay.com/appnotes/datasheets/OLEDs/SEPS525.pdf

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Co-developed-by: Beniamin Bia <beniamin.bia@analog.com>
Signed-off-by: Beniamin Bia <beniamin.bia@analog.com>
Link: https://lore.kernel.org/r/20191017170203.11999-1-beniamin.bia@analog.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>