MM does other important things (like enable GPS) even if no SIM is
installed, but when this returns non-zero after timing out waiting for a
SIM then we lose the ability to have MM enable GPS (for example). Other
failures related to selecting SIMs should still trigger a non-zero exit
and block MM (I guess), but if we waited a while and no SIM shows up
then let MM start anyways.
Signed-off-by: Clayton Craft <craftyguy@postmarketos.org>
Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/7634>
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