iwlwifi: cfg: use antenna diversity with all AX101 devices

We were erroneously only setting the tx_with_siso_diversity flag in
the Qu B-step configurations for AX101 devices, though we should do
it on all configurations.  Add the flag to the other two
configurations, namely Qu C-step and QuZ.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200306151129.1cd986ef467c.Idc0b111475ae3d38b68ae062613c080b574e33e1@changeid

drivers/net/wireless/intel/iwlwifi/cfg/22000.c

@@ -283,6 +283,7 @@ const struct iwl_cfg iwl_ax101_cfg_qu_c0_hr_b0 = {
 	 * HT size; mac80211 would otherwise pick the HE max (256) by default.
 	 */
 	.max_tx_agg_size = IEEE80211_MAX_AMPDU_BUF_HT,
+	.tx_with_siso_diversity = true,
 	.num_rbds = IWL_NUM_RBDS_22000_HE,
 };
 
@@ -309,6 +310,7 @@ const struct iwl_cfg iwl_ax101_cfg_quz_hr = {
 	 * HT size; mac80211 would otherwise pick the HE max (256) by default.
 	 */
 	.max_tx_agg_size = IEEE80211_MAX_AMPDU_BUF_HT,
+	.tx_with_siso_diversity = true,
 	.num_rbds = IWL_NUM_RBDS_22000_HE,
 };