Input: fix open count when closing inhibited device

Because the kernel increments device's open count in input_open_device()
even if device is inhibited, the counter should always be decremented in
input_close_device() to keep it balanced.

Fixes: a1816164

 ("Input: Add "inhibited" property")
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Link: https://lore.kernel.org/r/ZFFz0xAdPNSL3PT7@google.com
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>