wifi: iwlwifi: mvm: remove unneeded check

When checking if extra LTF should be disabled, we don't need to check the
the HW revision.
sband_eht_cap will be NULL if eht_capa::has_eht is false,
and that will be the case for the HWs that don't support EHT.

Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20241008072037.78b0adbb7b50.I630a64f06ca86baecde6a2a238733b7df3cf70e4@changeid


Signed-off-by: Johannes Berg <johannes.berg@intel.com>