ARM: dts: stm32: keep uart4 behavior on stm32mp157c-ed1

DMA configuration is added to uart nodes in stm32mp15x device tree.
Delete uart4 DMA property in stm32mp157c-ed1 board device tree to keep
console in irq mode, as DMA support for console has been removed from
the driver by commit e359b4411c28 ("serial: stm32: fix threaded
interrupt handling").

Signed-off-by: Erwan Le Ray <[e-mail]>
Signed-off-by: Alexandre Torgue <[e-mail]>

arch/arm/boot/dts/stm32mp157c-ed1.dts

···
 	pinctrl-0 = <&uart4_pins_a>;
 	pinctrl-1 = <&uart4_sleep_pins_a>;
 	pinctrl-2 = <&uart4_idle_pins_a>;
+	/delete-property/dmas;
+	/delete-property/dma-names;
 	status = "okay";
 };