keyboard-fw: bind Hyper+F1/F2 to display brightness decrement/increment
Apart from making Hyper+F1 to generate XF86MonBrightnessDown
and Hyper+F2 XF86MonBrightnessUp
, there are a few cleanups and tidings to make the code a bit easier to follow.
Signed-off-by: Sigrid Solveig Haflínudóttir sigrid@ftrv.se