arm64: dts: qcom: sdm845-shift-axolotl: fix Bluetooth

Add serial1 alias, firmware name and use 4 pin UART pinmux.
Signed-off-by: Dylan Van Assche <me@dylanvanassche.be>
Signed-off-by: Caleb Connolly <caleb@connolly.tech>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221016172944.1892206-3-kc@postmarketos.org

arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts

@@ -23,6 +23,7 @@ / {
 	aliases {
 		display0 = &framebuffer0;
 		serial0 = &uart9;
+		serial1 = &uart6;
 	};
 
 	chosen {
@@ -693,9 +694,17 @@ config {
 &uart6 {
 	status = "okay";
 
+	pinctrl-0 = <&qup_uart6_4pin>;
+
 	bluetooth {
 		compatible = "qcom,wcn3990-bt";
 
+		/*
+		 * This path is relative to the qca/
+		 * subdir under lib/firmware.
+		 */
+		firmware-name = "axolotl/crnv21.bin";
+
 		vddio-supply = <&vreg_s4a_1p8>;
 		vddxo-supply = <&vreg_l7a_1p8>;
 		vddrf-supply = <&vreg_l17a_1p3>;