arm64: dts: qcom: bullhead: Move UART pinctrl to SoC

This pinout is common for every 8992-based device and
should therefore reside in the SoC device tree.

Also convert addresses into phandles.
Signed-off-by: Konrad Dybcio <konradybcio@gmail.com>
Link: https://lore.kernel.org/r/20200625182118.131476-5-konradybcio@gmail.comSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/msm8992-bullhead-rev-101.dts

@@ -23,15 +23,6 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};
 
-	soc {
-		serial@f991e000 {
-			status = "okay";
-			pinctrl-names = "default", "sleep";
-			pinctrl-0 = <&blsp1_uart2_default>;
-			pinctrl-1 = <&blsp1_uart2_sleep>;
-		};
-	};
-
 	reserved-memory {
 		#address-cells = <2>;
 		#size-cells = <2>;
@@ -48,6 +39,10 @@ ramoops@1ff00000 {
 	};
 };
 
+&blsp1_uart2 {
+	status = "okay";
+};
+
 &rpm_requests {
 	pm8994-regulators {
 		compatible = "qcom,rpm-pm8994-regulators";