Omnia has GPIO expander that generates IRQs when the SFP is inserted or
removed.

mvneta driver in Omnia kernel is hacked to export attribute that sets
the target PHY. Catch is that interface has to be restarted after a switch
of the target PHY has happened.

This daemon connects this together: It waits for IRQ (in fact for GPIO
change) and performs the PHY switch and restart of network.

This is only a temporary solution for the meantime between Omnia release
and phylink driver adoption.