iwlwifi: mvm: fix a print of NSS for HT rate

Handling of the number of space time streams was missing for HT rate in
rate printing function. Fix it.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
index 80f99c3..13be9a5 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c
@@ -3616,6 +3616,8 @@
 	} else if (rate & RATE_MCS_HT_MSK) {
 		type = "HT";
 		mcs = rate & RATE_HT_MCS_INDEX_MSK;
+		nss = ((rate & RATE_HT_MCS_NSS_MSK)
+		       >> RATE_HT_MCS_NSS_POS) + 1;
 	} else {
 		type = "Unknown"; /* shouldn't happen */
 	}