Merge remote-tracking branch 'remotes/kraxel/tags/pull-input-20160928-1' into staging

Merge remote-tracking branch 'remotes/kraxel/tags/pull-input-20160928-1' into staging

input queue: ps2 kbd cleanups and improvements

# gpg: Signature made Wed 28 Sep 2016 13:52:16 BST
# gpg:                using RSA key 0x4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/pull-input-20160928-1:
  ps2: do not generate invalid key codes for unknown keys
  ps2: use QEMU qcodes instead of scancodes
  ps2: allow keycode translation for all scancode sets
  ps2: correctly handle 'get/set scancode' command
  ps2: reject unknown commands, instead of blindly accepting them

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>