add zte k540 (#9)

devices/t31_lite_zte-k540/general/overlay/etc/builder.msg

@@ -0,0 +1,3 @@
+#
+Experimental system for building OpenIPC firmware for known devices
+#

devices/t31_lite_zte-k540/general/overlay/etc/wireless/usb

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+#!/bin/sh
+
+set_gpio() {
+	[ "$2" -eq 1 ] && gpio set $1 || gpio clear $1
+	sleep 1
+}
+
+if [ "$1" = "atbm603x_wifi_usb" ]; then
+        set_gpio 51 0
+        modprobe atbm603x_wifi_usb
+        exit 0
+fi

devices/t31_lite_zte-k540/general/overlay/usr/share/openipc/customizer.sh

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+#!/bin/sh
+#
+# Perform basic settings on a known IP camera
+#
+#
+# Set custom upgrade url
+#
+fw_setenv upgrade 'https://github.com/OpenIPC/builder/releases/download/latest/t31_lite_zte-k540-nor.tgz'
+#
+#
+# Set custom majestic settings
+#
+cli -s .nightMode.enabled true
+cli -s .nightMode.irCutPin1 57
+cli -s .nightMode.irCutPin2 58
+cli -s .nightMode.backlightPin 11
+cli -s .video0.codec h264
+cli -s .audio.speakerPin 64
+#
+#
+# Set wlan device and credentials if need
+#
+fw_setenv wlandev atbm603x_wifi_usb
+#fw_setenv wlanssid Router
+#fw_setenv wlanpass 12345678
+#
+#
+# Set osmem and rmem
+#
+fw_setenv osmem 64M
+fw_setenv rmem 64M@0x4000000
+#
+exit 0