MAINTAINERS: remove myself as staging FBTFT maintainer

Even though I did introduce the fbtft code in staging a while ago to
stop seeing this being developed out-of-tree, I don't intend to
maintain it, and I don't use it actively. So be honest and remove
myself from the MAINTAINERS file for this subsystem.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

MAINTAINERS

@@ -5632,8 +5632,7 @@ F:	Documentation/fault-injection/
 F:	lib/fault-inject.c
 
 FBTFT Framebuffer drivers
-M:	Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
-S:	Maintained
+S:	Orphan
 F:	drivers/staging/fbtft/
 
 FC0011 TUNER DRIVER