Increase the serial login timeout from 60 to 120s. This seems like a
long time, however for a qemumips image with systemd+PAM and openssh,
(e.g. core-image-sato-sdk + DISTRO=poky-altcfg), the getty connects
to systemd's pam module which waits on logind and 45s for all this
to happen at the same time as things like ssh key generation happens
is not unknown.
Increase the timeout to match the longer times we know these things
can take in the worst case scenarios since we're tired of intermittent
issues related to the serial login affecting the autobuilder.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
