wifi: iwlwifi: clarify the meaning of IWL_INIT_PHY

wifi: iwlwifi: clarify the meaning of IWL_INIT_PHY

This is a bit that tells the firmware to wait for the
PHY_CONFIGURATION_CMD before completing its init sequence.
Clarify this in the comment.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250205145347.097510347ae2.Ica00b4b30163a21bf993fa968dd406ee4023fc9e@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>