ARM: dts: stm32: keep uart nodes behavior on stm32mp15xx-dhcor-avenger96

DMA configuration is added to uart nodes in stm32mp15x device tree.
Delete uart4 DMA property in stm32mp15xx-dhcor-avenger96 board device
tree to keep console in irq mode, as DMA support for console has been
removed from the driver by commit e359b441 ("serial: stm32: fix
threaded interrupt handling").
Delete also usart2 and uart7 DMA property to keep current behavior.
Signed-off-by: NErwan Le Ray <erwan.leray@foss.st.com>
Signed-off-by: NAlexandre Torgue <alexandre.torgue@foss.st.com>

arch/arm/boot/dts/stm32mp15xx-dhcor-avenger96.dtsi

@@ -376,6 +376,8 @@
 	label = "LS-UART1";
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart4_pins_b>;
+	/delete-property/dmas;
+	/delete-property/dma-names;
 	status = "okay";
 };
 
@@ -385,6 +387,8 @@
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart7_pins_a>;
 	uart-has-rtscts;
+	/delete-property/dmas;
+	/delete-property/dma-names;
 	status = "okay";
 };
 
@@ -394,6 +398,8 @@
 	pinctrl-0 = <&usart2_pins_a>;
 	pinctrl-1 = <&usart2_sleep_pins_a>;
 	st,hw-flow-ctrl;
+	/delete-property/dmas;
+	/delete-property/dma-names;
 	status = "okay";
 
 	bluetooth {