iwlwifi: mvm: use a define for checksum flags mask

For the upcoming Bz devices, we will set NETIF_F_HW_CSUM instead
of NETIF_F_IP_CSUM and NETIF_F_IPV6_CSUM. However, we still need
to be able to remove all the checksum bits, so add a mask for the
removal, and keep the old define for the feature advertisement.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20211219121514.f05488ce8b83.I65bb83721498d8433e4ee2b09415eb74ab579445@changeidSigned-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/iwl-config.h

@@ -84,6 +84,7 @@ enum iwl_nvm_type {
 #define IWL_DEFAULT_MAX_TX_POWER 22
 #define IWL_TX_CSUM_NETIF_FLAGS (NETIF_F_IPV6_CSUM | NETIF_F_IP_CSUM |\
 				 NETIF_F_TSO | NETIF_F_TSO6)
+#define IWL_CSUM_NETIF_FLAGS_MASK (IWL_TX_CSUM_NETIF_FLAGS | NETIF_F_RXCSUM)
 
 /* Antenna presence definitions */
 #define	ANT_NONE	0x0

drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c

@@ -717,8 +717,7 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 
 	hw->netdev_features |= mvm->cfg->features;
 	if (!iwl_mvm_is_csum_supported(mvm))
-		hw->netdev_features &= ~(IWL_TX_CSUM_NETIF_FLAGS |
-					 NETIF_F_RXCSUM);
+		hw->netdev_features &= ~IWL_CSUM_NETIF_FLAGS_MASK;
 
 	if (mvm->cfg->vht_mu_mimo_supported)
 		wiphy_ext_feature_set(hw->wiphy,