iwlwifi: debug print in tx_queue_set_status is more clear

The message was misleading when a queue is deactivated. The fifo
number is irrelevant then, so don't print it.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>