wifi: rt2x00: set VGC gain for both chains of MT7620

Set bbp66 for all chains of the MT7620.
Reported-by: NSerge Vasilugin <vasilugin@yandex.ru>
Signed-off-by: NDaniel Golle <daniel@makrotopia.org>
Acked-by: NStanislaw Gruszka <stf_xl@wp.pl>
Signed-off-by: NKalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/29e161397e5c9d9399da0fe87d44458aa2b90a78.1663445157.git.daniel@makrotopia.org

drivers/net/wireless/ralink/rt2x00/rt2800lib.c

@@ -5743,7 +5743,8 @@ static inline void rt2800_set_vgc(struct rt2x00_dev *rt2x00dev,
 	if (qual->vgc_level != vgc_level) {
 		if (rt2x00_rt(rt2x00dev, RT3572) ||
 		    rt2x00_rt(rt2x00dev, RT3593) ||
-		    rt2x00_rt(rt2x00dev, RT3883)) {
+		    rt2x00_rt(rt2x00dev, RT3883) ||
+		    rt2x00_rt(rt2x00dev, RT6352)) {
 			rt2800_bbp_write_with_rx_chain(rt2x00dev, 66,
 						       vgc_level);
 		} else if (rt2x00_rt(rt2x00dev, RT5592)) {