Add brightness fix for mipad 4

rw-system.sh

@@ -87,4 +87,8 @@ if grep -qF 'mkdir /data/.fps 0770 system fingerp' vendor/etc/init/hw/init.mmi.r
     chown system:9015 /sys/devices/soc/soc:fpc_fpc1020/irq_cnt
 fi
 
+if getprop ro.vendor.build.fingerprint |grep -q Xiaomi/clover/clover;then
+    setprop persist.sys.qcom-brightness $(cat /sys/class/leds/lcd-backlight/max_brightness)
+fi
+
 mount -o bind /system/phh/empty /vendor/overlay/SysuiDarkTheme/SysuiDarkTheme.apk || true