iwlwifi: pcie: dynamic Tx command queue size

Devices in the A000 family can use a different size for the command queue.
To allow this, make the command queue size configurable and set the size
for A000 devices to 32.

Signed-off-by: Shahar S Matityahu <shahar.s.matityahu@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/iwl-config.h

@@ -321,6 +321,8 @@ struct iwl_pwr_tx_backoff {
  * @gen2: a000 and on transport operation
  * @cdb: CDB support
  * @ext_nvm: extended NVM format
+ * @tx_cmd_queue_size: size of the cmd queue. If zero, use the same value as
+ *	the regular queues
  *
  * We enable the driver to be backward compatible wrt. hardware features.
  * API differences in uCode shouldn't be handled here but through TLVs
@@ -371,6 +373,7 @@ struct iwl_cfg {
 	    cdb:1,
 	    ext_nvm:1,
 	    dbgc_supported:1;
+	u16 tx_cmd_queue_size;
 	u8 valid_tx_ant;
 	u8 valid_rx_ant;
 	u8 non_shared_ant;