ARM: dts: stm32: change joystick pinctrl definition on stm32mp157c-ev1

Pins used for joystick are all configured as input. "push-pull" is not a
valid setting for an input pin.

Fixes: a502b343 ("pinctrl: stmfx: update pinconf settings")
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32mp157c-ev1.dts

@@ -221,7 +221,6 @@ stmfx_pinctrl: stmfx-pin-controller {
 
 			joystick_pins: joystick {
 				pins = "gpio0", "gpio1", "gpio2", "gpio3", "gpio4";
-				drive-push-pull;
 				bias-pull-down;
 			};
 		};