wifi: iwlwifi: mvm: fix getting LDPC/STBC support

Use flags field from struct ieee80211_tx_info in order to get
LDPC/STBC support. The rate parameter, used originally, is 16
bits only and does not have details of LDPC/STBC support.
Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230612184434.5a8856739b11.I6af4a55b22ed856f484ba77f87723dceec4904f2@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

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

@@ -343,9 +343,9 @@ static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm,
 			result |= RATE_MCS_SGI_MSK_V1;
 		if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 			result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1);
-		if (rate->flags & IEEE80211_TX_CTL_LDPC)
+		if (info->flags & IEEE80211_TX_CTL_LDPC)
 			result |= RATE_MCS_LDPC_MSK_V1;
-		if (u32_get_bits(rate->flags, IEEE80211_TX_CTL_STBC))
+		if (u32_get_bits(info->flags, IEEE80211_TX_CTL_STBC))
 			result |= RATE_MCS_STBC_MSK;
 	} else {
 		return 0;