kdrive: Don't lock input across read in KdNotifyFd

We won't need these locks with the new threaded input code as it holds
the input lock across all of the input device I/O operations.

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>

hw/kdrive/src/kinput.c

@@ -139,9 +139,7 @@ static void
 KdNotifyFd(int fd, int ready, void *data)
 {
     int i = (int) (intptr_t) data;
-    input_lock();
     (*kdInputFds[i].read)(fd, kdInputFds[i].closure);
-    input_unlock();
 }
 
 static void