keymap: Add Lenovo Enhanced USB Keyboard

https://bugs.freedesktop.org/show_bug.cgi?id=77234

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>
keymap: Asus EeePC touchpad toggle key

Originally is KEY_TOUCHPAD_TOGGLE, but X.org can't handle the big key events,
so use the F21 convention.

https://bugs.freedesktop.org/show_bug.cgi?id=72807

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>
keyboard: add Plantronics .Audio mute button

https://bugs.freedesktop.org/show_bug.cgi?id=79495

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>
hwdb: fix case-sensitive match

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>