iwlwifi: make the BC table layout configurable

This is needed for newer NICs.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --cc drivers/net/wireless/iwlwifi/iwl-trans.h
Simple merge

diff --cc drivers/net/wireless/iwlwifi/pcie/internal.h
Simple merge

diff --cc drivers/net/wireless/iwlwifi/pcie/trans.c
Simple merge

diff --cc drivers/net/wireless/iwlwifi/pcie/tx.c
Simple merge