xfree86: print out which driver is about to be used.

Makes reading the log file a lot easier for those that don't magically
recognise the log spew by the individual drivers.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Dan Nicholson <dbn.lists@gmail.com>

hw/xfree86/common/xf86Xinput.c

@@ -775,6 +775,8 @@ xf86NewInputDevice(InputInfoPtr pInfo, DeviceIntPtr *pdev, BOOL enable)
         goto unwind;
     }
 
+    xf86Msg(X_INFO, "Using input driver '%s' for '%s'\n", drv->driverName, pInfo->name);
+
     if (!drv->PreInit) {
         xf86Msg(X_ERROR,
                 "Input driver `%s' has no PreInit function (ignoring)\n",