mac80211: minstrel_ht: remove extraneous indentation on if statement

The increment of idx is indented one level too deeply, clean up the
code by removing the extraneous tab.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20210416095137.2033469-1-colin.king@canonical.comSigned-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/rc80211_minstrel_ht.c

@@ -370,7 +370,7 @@ minstrel_ht_get_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
 		/* short preamble */
 		if ((mi->supported[group] & BIT(idx + 4)) &&
 		    (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE))
-				idx += 4;
+			idx += 4;
 		goto out;
 	}