wifi: iwlwifi: move IWL_LMAC_*_INDEX to fw/api/context.h

Those macros are currently in fw/api/binding.h, which should really not
be included in newer code, where this API is not used.
Just move it.

Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Link: https://patch.msgid.link/20241028135215.48443f1c1819.I1cfe8c6c58153031d44f81edc0f8731077666355@changeid


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