iwlwifi: make hw rev checking more readable

Rather than ANDing with a mask - use existing macros, which
are more readable.

Signed-off-by: Liad Kaufman <liad.kaufman@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

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

diff --cc drivers/net/wireless/iwlwifi/iwl-io.c
Simple merge

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

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