wifi: iwlwifi: mvm: Refactor iwl_mvm_get_lmac_id()

The iwl_mvm_get_lmac_id() function is currently
defined as a static inline function under fw/api
and receives mvm's fw pointer. It will need the
ability to access other mvm struct members for
future capabilities such as debug. Move the function
out of the fw/api and into mvm proper as a regular
function and have it receive the pointer to mvm.

Signed-off-by: Ariel Malamud <ariel.malamud@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230613155501.507b2f9f64eb.I0ec91310e1911c33faf396b5e17bcb11a164f6ea@changeid


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