fm10k: add Rx/Tx single queue start/stop

fm10k: add Rx/Tx single queue start/stop

1. Add 4 functions fm10k_dev_rx_queue_start,
   fm10k_dev_rx_queue_stop, fm10k_dev_tx_queue_start,
   and fm10k_dev_tx_queue_stop.
2. verify Rx packet buffer alignment is valid.
   Hardware requires specific alignment for Rx packet buffers. At
   least one of the following two conditions must be satisfied.
       1) Address is 512B aligned
       2) Address is 8B aligned and buffer does not cross 4K boundary.

   Alignment is checked by the driver when the Rx queue is reset. It
   is assumed that if an entire descriptor ring can be filled with
   buffers containing valid alignment, then all buffers in that mempool
   have valid address alignment. It is the responsibility of the user
   to ensure all buffers have valid alignment, as it is the user who
   creates the mempool.

   It is assumed the buffer needs only to store a maximum size Ethernet
   frame.

Signed-off-by: Jeff Shaw <jeffrey.b.shaw@intel.com>
Signed-off-by: Chen Jing D(Mark) <jing.d.chen@intel.com>