arm64: dts: qcom: sdm630-nile: Enable and configure PM660L WLED

The board-specific (electrical) configuration was removed from PM660L in
90ba636e ("arm64: dts: qcom: pm660l: Remove board-specific WLED
configuration") as it is platform-dependent.  We reintroduce it here in
the Nile board configuration (with a slightly lower current limit, as
per downstream DT sources) and enable it for use in the dsi0 node.
Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Link: https://lore.kernel.org/r/20240204-sdm630-nile-wled-v1-1-9f5c4f8147f2@somainline.orgSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm64/boot/dts/qcom/sdm630-sony-xperia-nile.dtsi

@@ -241,6 +241,16 @@ led@3 {
 	};
 };
 
+&pm660l_wled {
+	status = "okay";
+
+	qcom,switching-freq = <800>;
+	qcom,ovp-millivolt = <29600>;
+	qcom,current-boost-limit = <970>;
+	qcom,current-limit-microamp = <17500>;
+	qcom,num-strings = <2>;
+};
+
 &pon_pwrkey {
 	status = "okay";
 };