ARM64: dts: qcom: umi: Do not disable UFS LPM for umi

It's actually only used for factory build (not shipping build).

Although the property exists, but Xiaomi has made the code ignoring
this property [1] in shipping builds.

Thanks to the commit [2] for pointing it out.

[1]: https://github.com/MiCode/Xiaomi_Kernel_OpenSource/blob/umi-q-oss/drivers/scsi/ufs/ufs-qcom.c#L2109
[2]: https://review.lineageos.org/c/LineageOS/android_kernel_xiaomi_sm8250/+/395199

Change-Id: I64524f425500784daec6e34eda2184b28ec069dd

arch/arm64/boot/dts/vendor/qcom/umi-sm8250.dtsi

@@ -7,9 +7,11 @@ And public attribution of xiaomi platforms(like J2 and so and)
 #include "xiaomi-sm8250-common.dtsi"
 #include "umi-audio-overlay.dtsi"
 
+/*
 &ufshc_mem {
 	qcom,disable-lpm;
 };
+*/
 
 &qupv3_se15_i2c {
 	status = "ok";