realtek: consolidate bootargs again

Bootargs for devices in the realtek target were previously consolidated
in commit af2cfbda ("realtek: Consolidate bootargs"), since all
devices currently use the same arguments.

Commit a75b9e3e ("realtek: Adding RTL930X sub-target") reverted this
without any argumentation, so let's undo that.

Commit 0b8dfe08 ("realtek: Add RTL931X sub-target") introduced the
old bootargs also for RTL931x, without providing any actual device
support. Until that is done, let's assume vendors will have done what
they did before, and use a baud rate of 115200.

Fixes: a75b9e3e ("realtek: Adding RTL930X sub-target")
Signed-off-by: Sander Vanheule <sander@svanheule.net>

target/linux/realtek/dts-5.10/rtl8393_zyxel_gs1900-48.dts

@@ -21,10 +21,6 @@
 		reg = <0x0 0x8000000>;
 	};
 
-	chosen {
-		bootargs = "console=ttyS0,115200";
-	};
-
 	leds {
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinmux_disable_sys_led>;

target/linux/realtek/dts-5.10/rtl839x.dtsi

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

target/linux/realtek/dts-5.10/rtl9302_zyxel_xgs1250-12.dts

@@ -10,10 +10,6 @@
 	compatible = "zyxel,xgs1250-12", "realtek,rtl838x-soc";
 	model = "Zyxel XGS1250-12 Switch";
 
-	chosen {
-		bootargs = "console=ttyS0,115200";
-	};
-
 	keys {
 		compatible = "gpio-keys";
 

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

@@ -25,7 +25,7 @@
 	};
 
 	chosen {
-		bootargs = "console=ttyS0,38400";
+		bootargs = "console=ttyS0,115200";
 	};
 
 	cpuintc: cpuintc {

target/linux/realtek/dts-5.10/rtl931x.dtsi

@@ -30,7 +30,7 @@
 	};
 	
 	chosen {
-		bootargs = "console=ttyS0,38400";
+		bootargs = "console=ttyS0,115200";
 	};
 
 	lx_clk: lx_clk {