wifi: iwlwifi: cfg: rename BW_NO_LIMIT to BW_NOT_LIMITED

It's not clear that it makes sense to have any matches
for IWL_CFG_ANY for this bit, but let's assume for now
that this makes sense. Then, it's clearer to call this
BW_NOT_LIMITED rather than BW_NO_LIMIT, since the last
change.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250502155404.9b39693b505c.Ib47aa6a072a0e61bbba28383ce54764cd859f19c@changeid