net/cxgbe: remove LSB interrupt support
net/cxgbe: remove LSB interrupt support

Remove RTE_PCI_DRV_INTR_LSC from driver flags, since LSC interrupts
are currently not supported.

Signed-off-by: Rahul Lakkireddy <3a6b348815dc68871481a310c146a6b821ba8f72@chelsio.com>
Signed-off-by: Kumar Sanghvi <f6a160a15fd9abb18ae6fdc1d3a3ec4658ed0db6@chelsio.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk