iwlwifi: dvm: don't use _ni mac80211's callbacks

This is not needed since the PCIe layer disables the
bottom halves before it calls the op_mode.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --cc drivers/net/wireless/iwlwifi/dvm/rx.c
Simple merge

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