HID: asus: reformat the hotkey mapping block

Older formatting of this block was beginning to get somewhat cluttered.
Condensing the block and putting comments to the side makes it easier
to read and scan the scancodes plus keycodes.

Signed-off-by: Luke D. Jones <luke@ljones.dev>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>