MFC: Merge ENA v2.2.0 driver
r361530 Update ENA driver version to v2.2.0
r361529 Refactor ena_tx_map_mbuf() function
r361528 Fix double-free bug within ena_detach()
r361527 Allow disabling meta caching for ENA Tx path
r361526 Create ENA IO queues with optional backoff
r361525 Add sysctl node for ENA IO queues number adjustment
r361524 Fix assumptions about number of IO queues in the ENA
r361523 Rework ENA Tx buffer ring size reconfiguration
r361521 Rework ENA Rx queue size configuration
r361518 Improve indentation in ena_up() and ena_down()
r361517 Expose argument names for non static ENA driver functions
r361516 Use single global lock in the ENA driver
r361515 Add trigger reset function in the ENA driver
r361514 Provide ENA driver version in a sysctl node
r361513 Remove unused argument from static function in ena.c
r361512 Enable Tx drops reporting in the ENA driver
r361511 Adjust ENA driver to the new HAL
r358289 Rework and simplify Tx DMA mapping in ENA
Obtained from: Semihalf
Sponsored by: Amazon, Inc.