dix: add property support for pointer acceleration.

Note: properties don't need to be cleaned up, the DIX does it for us anyway.
Data that is stored in properties is cleaned up by the property system.
Handlers, etc. don't need to be unregistered while cleaning up, as they get
deleted when the device is removed anyway.

Signed-off-by: Peter Hutterer <peter.hutterer@redhat.com>
Signed-off-by: Simon Thum <simon.thum@gmx.de>

include/ptrveloc.h

@@ -43,6 +43,7 @@
 #define AccelProfilePower 5
 #define AccelProfileLinear 6
 #define AccelProfileReserved 7
+#define AccelProfileLAST AccelProfileReserved
 
 /* fwd */
 struct _DeviceVelocityRec;
@@ -103,6 +104,9 @@ typedef struct _DeviceVelocityRec {
 extern _X_EXPORT void
 InitVelocityData(DeviceVelocityPtr s);
 
+extern _X_EXPORT BOOL
+InitializePredictableAccelerationProperties(DeviceIntPtr pDev);
+
 extern _X_EXPORT void
 InitFilterChain(DeviceVelocityPtr s, float rdecay, float degression,
                 int lutsize, int stages);