arm64: dts: fvp: Set stdout-path to serial0 in the chosen node

Add stdout-path to the fast models(FVP and Foundation) devicetrees to
specify the primary console. This means that distributions can boot
without the need for platform-specific command line parameters i.e.
they can use earlycon with no parameters and no console argument is
needed at all.

Signed-off-by: Debbie Martin <Debbie.Martin@arm.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Message-Id: <20240730103758.907950-1-Debbie.Martin@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

arch/arm64/boot/dts/arm/foundation-v8.dtsi

@@ -18,7 +18,9 @@
 	#address-cells = <2>;
 	#size-cells = <2>;
 
-	chosen { };
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
 
 	aliases {
 		serial0 = &v2m_serial0;

arch/arm64/boot/dts/arm/fvp-base-revc.dts

@@ -24,7 +24,9 @@
 	#address-cells = <2>;
 	#size-cells = <2>;
 
-	chosen { };
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
 
 	aliases {
 		serial0 = &v2m_serial0;

arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts

@@ -23,7 +23,9 @@
 	#address-cells = <2>;
 	#size-cells = <2>;
 
-	chosen { };
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
 
 	aliases {
 		serial0 = &v2m_serial0;