iwlwifi: mvm: clean up FIFO definitions

Move all FIFO definitions together into the firmware API
header file and use the same enum/naming scheme for the
command FIFO.

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

diff --cc drivers/net/wireless/iwlwifi/mvm/fw-api.h
Simple merge

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

diff --cc drivers/net/wireless/iwlwifi/mvm/ops.c
Simple merge