Input: introduce input_inject_event() function

Create input_inject_event() function which is to be used by input
handlers as opposed to input_event() which is reserved for drivers
implementing input devices. The difference is that if device is
"grabbed" by some process input_inject_event() will ignore events
unless sent from the handle that is currently owns the device.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index 2426a5d..4bf4818 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -256,7 +256,7 @@
 
 		if (evdev_event_from_user(buffer + retval, &event))
 			return -EFAULT;
-		input_event(list->evdev->handle.dev, event.type, event.code, event.value);
+		input_inject_event(&list->evdev->handle, event.type, event.code, event.value);
 		retval += evdev_event_size();
 	}
 
@@ -424,8 +424,8 @@
 			if (get_user(v, ip + 1))
 				return -EFAULT;
 
-			input_event(dev, EV_REP, REP_DELAY, u);
-			input_event(dev, EV_REP, REP_PERIOD, v);
+			input_inject_event(&evdev->handle, EV_REP, REP_DELAY, u);
+			input_inject_event(&evdev->handle, EV_REP, REP_PERIOD, v);
 
 			return 0;