ARM: dts: qcom: ipq4018-ap120c-ac: setup serial console

Add the required alias and stdout property so that kernel can setup
the console based off DTS and not have to set it in the cmdline.
Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230214161211.306462-1-robert.marko@sartura.hr

arch/arm/boot/dts/qcom-ipq4018-ap120c-ac.dtsi

@@ -8,6 +8,14 @@ / {
 	model = "ALFA Network AP120C-AC";
 	compatible = "alfa-network,ap120c-ac", "qcom,ipq4018";
 
+	aliases {
+		serial0 = &blsp1_uart1;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
 	keys {
 		compatible = "gpio-keys";