interface: automask interrupts to polling rxqs
interface: automask interrupts to polling rxqs

Sometimes, vnet_hw_if_rx_queue_set_int_pending is called on rxqs which
are not in interrupt mode. Currently, it segfaults due to a too small
clib_interrupt_t structure. This change prevents that and makes the
framework slightly more robust to driver bugs (that might be subtle
to track in some cases involving concurrency...)

Change-Id: I9643b9b1aa37e6852754b93f10cd2f96ed9e6118
Signed-off-by: Mohammed Hawari <e345ebb5fb15a590b29a075cdaf46eed42e192de@hawari.fr>
Type: fix

chrisy/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp