realtek: Consolidate bootargs

All current devices use identical bootargs, so let's move that to the
common devicetree includes.

Signed-off-by: Sander Vanheule <sander@svanheule.net>
Tested-by: Stijn Segers <foss@volatilesystems.org>
Tested-by: Paul Fertser <fercerpav@gmail.com>
Tested-by: Stijn Tintel <stijn@linux-ipv6.be>

target/linux/realtek/dts-5.10/rtl8380_netgear_gigabit.dtsi

@@ -8,10 +8,6 @@
 / {
 	compatible = "realtek,rtl838x-soc";
 
-	chosen {
-		bootargs = "console=ttyS0,115200";
-	};
-
 	memory@0 {
 		device_type = "memory";
 		reg = <0x0 0x8000000>;

target/linux/realtek/dts-5.10/rtl8380_zyxel_gs1900.dtsi

@@ -13,10 +13,6 @@
 		led-upgrade = &led_sys;
 	};
 
-	chosen {
-		bootargs = "console=ttyS0,115200";
-	};
-
 	memory@0 {
 		device_type = "memory";
 		reg = <0x0 0x8000000>;

target/linux/realtek/dts-5.10/rtl8382_allnet_all-sg8208m.dts

@@ -16,10 +16,6 @@
 		led-upgrade = &led_sys;
 	};
 
-	chosen {
-		bootargs = "console=ttyS0,115200";
-	};
-
 	memory@0 {
 		device_type = "memory";
 		reg = <0x0 0x8000000>;

target/linux/realtek/dts-5.10/rtl8382_d-link_dgs-1210-10p.dts

@@ -16,10 +16,6 @@
 		led-upgrade = &led_power;
 	};
 
-	chosen {
-		bootargs = "console=ttyS0,115200";
-	};
-
 	memory@0 {
 		device_type = "memory";
 		reg = <0x0 0x8000000>;

target/linux/realtek/dts-5.10/rtl8382_d-link_dgs-1210.dtsi

@@ -13,10 +13,6 @@
 		led-upgrade = &led_power;
 	};
 
-	chosen {
-		bootargs = "console=ttyS0,115200";
-	};
-
 	memory@0 {
 		device_type = "memory";
 		reg = <0x0 0x8000000>;

target/linux/realtek/dts-5.10/rtl8382_inaba_aml2-17gp.dts

@@ -9,10 +9,6 @@
 	compatible = "inaba,aml2-17gp", "realtek,rtl838x-soc";
 	model = "INABA Abaniact AML2-17GP";
 
-	chosen {
-		bootargs = "console=ttyS0,115200";
-	};
-
 	memory@0 {
 		device_type = "memory";
 		reg = <0x0 0x8000000>;

target/linux/realtek/dts-5.10/rtl838x.dtsi

@@ -65,7 +65,7 @@
 	};
 
 	chosen {
-		bootargs = "console=ttyS0,38400";
+		bootargs = "console=ttyS0,115200";
 	};
 
 	cpuintc: cpuintc {

target/linux/realtek/dts-5.10/rtl930x.dtsi

@@ -70,7 +70,7 @@
 	};
 
 	chosen {
-		bootargs = "console=ttyS0,38400";
+		bootargs = "console=ttyS0,115200";
 	};
 
 	cpuintc: cpuintc {