Buttons of AVM FritzBox 4020 are incorrectly flagged as active high.

This was an oversight as RFKill button was working as expected even
with incorrectly flagged GPIO.

Signed-off-by: David Bauer <m...@david-bauer.net>
---

This commit should also be applied to the openwrt-18.06 branch as the
issue is also present there.

 target/linux/ar71xx/files/arch/mips/ath79/mach-fritz4020.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-fritz4020.c 
b/target/linux/ar71xx/files/arch/mips/ath79/mach-fritz4020.c
index ed7f9a8b3e..c00cf681b2 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-fritz4020.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-fritz4020.c
@@ -169,7 +169,7 @@ static struct gpio_keys_button fritz4020_gpio_keys[] 
__initdata = {
                .code                   = KEY_RFKILL,
                .debounce_interval      = FRITZ4020_KEYS_DEBOUNCE_INTERVAL,
                .gpio                   = FRITZ4020_GPIO_BTN_WLAN,
-               .active_low             = 0,
+               .active_low             = 1,
        },
        {
                .desc                   = "WPS button",
@@ -177,7 +177,7 @@ static struct gpio_keys_button fritz4020_gpio_keys[] 
__initdata = {
                .code                   = KEY_WPS_BUTTON,
                .debounce_interval      = FRITZ4020_KEYS_DEBOUNCE_INTERVAL,
                .gpio                   = FRITZ4020_GPIO_BTN_WPS,
-               .active_low             = 0,
+               .active_low             = 1,
        },
 };
 
-- 
2.18.0


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