net/i40e: enable multi-queue Rx interrupt for VF

net/i40e: enable multi-queue Rx interrupt for VF

Current implementation is that only one Rx queue can support interrupt,
because all queues are mapped in the same vector id in
vfio_enable_msix(). So VF can not support multi-queue Rx interrupt in
the interrupt mode.

In this patch, if the packet I/O interrupt on datapath is enabled
(rte_intr_dp_is_en(intr_handle) is true), we map different interrupt
vectors to each queue and send this map to PF. After PF sets the map to
the register, all Rx queue interrupts will be received.

In addition, vector id should less than the maximum vector value. When
queue number is more than vector value, we set up a loop of interrupt
vectors map.

Signed-off-by: Lunyuan Cui <lunyuanx.cui@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>