ath10k: Add support for chain1 regulator supply voting

Add support to vote for chain-1 voltage regulator
in WCN3990.

Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.3.1-01040-QCAHLSWMTPLZ-1
Signed-off-by: Rakesh Pillai <pillair@codeaurora.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1593194502-13164-3-git-send-email-pillair@codeaurora.org

drivers/net/wireless/ath/ath10k/snoc.c

@@ -46,6 +46,7 @@ static const char * const ath10k_regulators[] = {
 	"vdd-1.8-xo",
 	"vdd-1.3-rfa",
 	"vdd-3.3-ch0",
+	"vdd-3.3-ch1",
 };
 
 static const char * const ath10k_clocks[] = {