[PATCH] ath79: increase the rfkill debounce interval for TP-Link Archer C7 v2

[Shiji Yang]

From: Shiji Yang <yangshiji66 at qq.com>

Due to circuit issue or silicon defect, sometimes the WiFi switch button
of the Archer C7 v2 can be accidentally triggered multiple times in one
second. This will cause WiFi to be unexpectedly shut down and trigger
'irq 23: nobody cared'[1] warning. Increasing the key debounce interval
to 1000 ms can fix this issue. This patch also add the missing rfkill
key label.

[1] Warning Log:
```
[87765.218511] irq 23: nobody cared (try booting with the "irqpoll" option)
[87765.225331] CPU: 0 PID: 317 Comm: irq/23-keys Not tainted 5.15.118 #0
...
[87765.486246] handlers:
[87765.488543] [<85257547>] 0x800c29a0 threaded [<5c6328a2>] 0x80ffe0b8 [gpio_button_hotplug at 4cf73d00+0x1a00]
[87765.498364] Disabling IRQ #23
```

Fixes: https://github.com/openwrt/openwrt/issues/13010
Fixes: https://github.com/openwrt/openwrt/issues/12167
Fixes: https://github.com/openwrt/openwrt/issues/11191
Fixes: https://github.com/openwrt/openwrt/issues/7835

Tested-by: Hans Hasert
Signed-off-by: Shiji Yang <yangshiji66 at qq.com>
---
 target/linux/ath79/dts/qca9558_tplink_archer-c7-v2.dts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/target/linux/ath79/dts/qca9558_tplink_archer-c7-v2.dts b/target/linux/ath79/dts/qca9558_tplink_archer-c7-v2.dts
index b7ac902003..1b860dbf2d 100644
--- a/target/linux/ath79/dts/qca9558_tplink_archer-c7-v2.dts
+++ b/target/linux/ath79/dts/qca9558_tplink_archer-c7-v2.dts
@@ -13,10 +13,11 @@
 
 &keys {
 	rfkill {
+		label = "rfkill";
 		gpios = <&gpio 23 GPIO_ACTIVE_LOW>;
 		linux,code = <KEY_RFKILL>;
 		linux,input-type = <EV_SW>;
-		debounce-interval = <60>;
+		debounce-interval = <1000>;
 	};
 };
 
-- 
2.30.2