wifi: iwlwifi: mvm: introduce esr_disable_reason

wifi: iwlwifi: mvm: introduce esr_disable_reason

This will maintain a bitmap of reasons for which we want to avoid
enabling EMLSR.
For now, we have a single reason: BT coexistence, but we will add soon
more reasons. Make it a bitmap to make it easier to manage.

Since we'll impact the parameters that impact the enablement /
disablement of EMLSR from several places, introduce a generic function
that takes into account the current state and execute the decision that
must be taken.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240416134215.94c3590c6f27.I6a190da5025d0523ef483ffac0c64e26675041e6@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>