mt76: mt7615: remove a stray if statement

This if statement was supposed to be deleted, but it wasn't.  It means
that we sometimes don't set the sensitivity correctly.

Fixes: 2cad515ece8a ("mt76: mt7615: add missing settings for simultaneous dual-band support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

mt7615/mac.c

@@ -1630,7 +1630,6 @@ mt7615_mac_adjust_sensitivity(struct mt7615_phy *phy,
 				 MT_WF_PHY_PD_OFDM(ext_phy, val));
 		} else {
 			val = *sensitivity + 256;
-			if (!ext_phy)
 			mt76_rmw(dev, MT_WF_PHY_RXTD_CCK_PD(ext_phy),
 				 MT_WF_PHY_PD_CCK_MASK(ext_phy),
 				 MT_WF_PHY_PD_CCK(ext_phy, val));