ARM: dts: stm32: Fix GPIO hog flags on DHCOM DRC02

The GPIO hog flags are ignored by gpiolib-of.c now, set the flags to 0.
Since GPIO_ACTIVE_HIGH is defined as 0, this change only increases the
correctness of the DT.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Patrice Chotard <patrice.chotard@st.com>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>

arch/arm/dts/stm32mp15xx-dhcom-drc02.dts

@@ -37,7 +37,7 @@
 	 */
 	usb-hub {
 		gpio-hog;
-		gpios = <8 GPIO_ACTIVE_HIGH>;
+		gpios = <8 0>;
 		output-high;
 		line-name = "rs485-rx-en";
 	};
@@ -65,7 +65,7 @@
 	 */
 	usb-hub {
 		gpio-hog;
-		gpios = <2 GPIO_ACTIVE_HIGH>;
+		gpios = <2 0>;
 		output-high;
 		line-name = "usb-hub-reset";
 	};