MAINTAINERS: update linux-user maintainer

I haven't been active for a while. Pass the maintainer hat
forward to Laurent, who has done a stellar job filling in.

Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20200702111636.25792-1-riku.voipio@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
1 file changed