MAINTAINERS: Adds Andreas Werner to maintainers list for MEN F21BMC
Added maintainer for the following MEN F21BMC drivers:
- menf21bmc (MFD)
- menf21bmc_wdt (Watchdog)
- menf21bmc_hwmon (HWMON)
- leds-menf21bmc (LED)
Signed-off-by: Andreas Werner <andreas.werner@men.de> Acked-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Bryan Wu <cooloney@gmail.com> Acked-by: Wim Van Sebroeck <wim@iguana.be> Signed-off-by: Lee Jones <lee.jones@linaro.org>