Add Pinebook touchpad deceleration

Author: ayufan

package/root/etc/X11/xorg.conf.d/50-pine64-pinebook-touchpad.conf

@@ -0,0 +1,11 @@
+# Taken from https://github.com/longsleep/build-pine64-image/blob/master/simpleimage/platform-scripts/install_mate_desktop.sh#L67
+
+Section "InputClass"
+   Identifier "HAILUCK CO.,LTD USB KEYBOARD"
+   MatchIsPointer "1"
+   MatchDevicePath "/dev/input/event*"
+   Option "AccelerationProfile" "2"
+   Option "AdaptiveDeceleration" "1"
+   Option "ConstantDeceleration" "2.4" # Pinebook 14"
+   #Option "ConstantDeceleration" "1.2" # Pinebook 11"
+EndSection