On these several HP laptops, the microphone mute hotkey is "Fn+F8" and the scancode for this hotkey is 0x81, but this scancode was mapped to fn_esc in the HP generic keymap section. To fix this problem, we add a machine specific keymap section to add the correct keymap rule. BugLink: https://bugs.launchpad.net/bugs/1409721 BugLink: https://bugs.launchpad.net/bugs/1334968 Signed-off-by: Hui Wang <hui.wang@canonical.com>