The ST-internal Nomadik mailing list is going down. Remove
it from the MAINTAINERS file.

Cc: Olivier CLERGEAUD <olivier.clergeaud@st.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NOlof Johansson <olof@lixom.net>