staging: dpaa2-ethsw: ignore state interrupts when the interface is not running

Link state interrupts will be transmitted to the DPSW object even though
the user has not yet issued a 'ifconfig up' on a switch interface. Don't
act on those interrupts since there are of no interrest.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Link: https://lore.kernel.org/r/20200714133431.17532-3-ioana.ciornei@nxp.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>