update KDrive to new input API

Update KDrive to fit the new API (mieqInit and InitPointerDeviceStruct), and
include InitTouchscreenDeviceStruct in the DIX.

dix/devices.c

@@ -837,6 +837,27 @@ InitValuatorClassDeviceStruct(DeviceIntPtr dev, int numAxes,
     return TRUE;
 }
 
+_X_EXPORT Bool
+InitTouchscreenClassDeviceStruct(DeviceIntPtr dev)
+{
+    register TouchscreenClassPtr tsc;
+
+    tsc = (TouchscreenClassPtr)xalloc(sizeof(TouchscreenClassRec));
+    if (!tsc)
+        return FALSE;
+
+    /* we don't do anything sensible with these, but should */
+    tsc->min_x = -1;
+    tsc->min_y = -1;
+    tsc->max_x = -1;
+    tsc->max_y = -1;
+
+    tsc->button_threshold = 0;
+    dev->touchscreen = tsc;
+
+    return TRUE;
+}
+
 _X_EXPORT Bool
 InitFocusClassDeviceStruct(DeviceIntPtr dev)
 {