Enable Synaptics InterTouch for confirmed touchpads if not already loaded (#4499)

* Enable Synaptics InterTouch for confirmed touchpads if not already loaded

* fix echo message

* remove shebang and echo messages

* check for synaptics intertouch and enable it only if available

install/config/hardware/synaptic-touchpad.sh

@@ -0,0 +1,6 @@
+# Enable Synaptics InterTouch for confirmed touchpads if not already loaded
+
+if grep -qi synaptics /proc/bus/input/devices \
+   && ! lsmod | grep -q '^psmouse'; then
+    modprobe psmouse synaptics_intertouch=1
+fi