File tests/acceptance/linux_ssh_mips_malta.py is crucial for
entire MIPS platform, so add it to the MIPS section. The
maintainership will be shared with others.

Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Message-Id: <1575982519-29852-6-git-send-email-aleksandar.markovic@rt-rk.com>