mmc: tmio: remove myself as a maintainer

Since I'm currently unable to dedicate sufficient time to driver
maintainership, remove myself from the maintainers list.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>

MAINTAINERS

@@ -8637,7 +8637,6 @@ F:	include/linux/toshiba.h
 F:	include/uapi/linux/toshiba.h
 
 TMIO MMC DRIVER
-M:	Guennadi Liakhovetski <g.liakhovetski@gmx.de>
 M:	Ian Molton <ian@mnementh.co.uk>
 L:	linux-mmc@vger.kernel.org
 S:	Maintained