Revert "arm: dts: at91: Fix boolean properties with values"

This reverts commit 0dc23d1a, which caused another regression
as the pinctrl code actually expects an integer value of 0 or 1
rather than a simple boolean property.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/at91-kizbox3-hs.dts

@@ -225,7 +225,7 @@ pinctrl_pio_zbe_rst: gpio_zbe_rst {
 		pinctrl_pio_io_reset: gpio_io_reset {
 			pinmux = <PIN_PB30__GPIO>;
 			bias-disable;
-			drive-open-drain;
+			drive-open-drain = <1>;
 			output-low;
 		};
 		pinctrl_pio_input: gpio_input {

arch/arm/boot/dts/at91-kizbox3_common.dtsi

@@ -211,7 +211,7 @@ pinctrl_flx4_default: flx4_i2c6_default {
 		pinmux = <PIN_PD12__FLEXCOM4_IO0>, //DATA
 		<PIN_PD13__FLEXCOM4_IO1>; //CLK
 		bias-disable;
-		drive-open-drain;
+		drive-open-drain = <1>;
 	};
 
 	pinctrl_pwm0 {