iwlwifi: mvm: rs: add logs for the wrong antenna case

In case that rate's antenna is wrong at the init stage, it's
very hard to say what went wrong. Add debug data to the already
existing WARN_ON_ONCE.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>