xfree86: wrap keyboard devices for XKB.

Call ProcessOtherEvents first, then for all keyboard devices let them be
wrapped by XKB. This way all XI events will go through XKB.

Note that the VCK is still not wrapped, so core events will bypass XKB.

(cherry picked from commit d627061b48)

hw/xfree86/common/xf86Xinput.c

@@ -165,6 +165,11 @@ xf86ActivateDevice(LocalDevicePtr local)
         dev->coreEvents = local->flags & XI86_ALWAYS_CORE;
         RegisterOtherDevice(dev);
 
+#ifdef XKB
+        if (!noXkbExtension)
+            XkbSetExtension(dev, ProcessKeyboardEvent);
+#endif
+
         if (serverGeneration == 1) 
             xf86Msg(X_INFO, "XINPUT: Adding extended input device \"%s\" (type: %s)\n",
                     local->name, local->type_name);