iwlwifi: fix small doc mistake for iwl_fw_ini_addr_val

There was a small copy and paste mistake in the doc declaration of
iwl_fw_ini_addr_val.  Fix it.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20220205112029.aeec71c397b3.I0ba3234419eb8c8c7512a2ca531a6dbb55046cf7@changeid


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