iwlwifi: mvm: d3: make key reprogramming iteration optional

Now that only reprogramming is left in the initial key iteration,
skip it entirely on unified firmware images instead of skipping
only the command sending inside of it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210805130823.c6f77325c430.I798ce9d757492a9e3d223c1de5d4e62ebbc00b2c@changeid


Signed-off-by: Luca Coelho <luciano.coelho@intel.com>