staging: fbtft: Remove fb_watterott driver

This driver was made for a prototype and as far as I know it never went
into production because it was too slow. So let's remove it.

Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://lore.kernel.org/r/20211105202448.62518-1-noralf@tronnes.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>