sm8450-common: rootdir: Add more infos to `ro.boot.hardware.revision` prop

Change-Id: I8110a8a9ec653b4dbb73563336c3859571d0a58e

rootdir/etc/init.xiaomi_sm8450.rc

@@ -131,4 +131,4 @@ service vendor.sensors-hal-2-1-multihal /vendor/bin/hw/android.hardware.sensors@
     socket audio_us_socket_1 seqpacket 0666 system system
 
 on property:ro.boot.hwversion=*
-    setprop ro.boot.hardware.revision ${ro.boot.hwversion}
+    setprop ro.boot.hardware.revision ${ro.boot.hwc}_${ro.boot.hwlevel}_${ro.boot.hwversion}