fw/b: Implement hardware keys custom rebinding

Co-authored-by: Arne Coucheron <arco68@gmail.com>
Co-authored-by: Bruno Martins <bgcngm@gmail.com>
Co-authored-by: Cosmin Tanislav <demonsingur@gmail.com>
Co-authored-by: Danesh Mondegarian <daneshm90@gmail.com>
Co-authored-by: Dhina17 <dhinalogu@gmail.com>
Co-authored-by: kyasu <kyasu.dev@gmail.com>
Co-authored-by: LuK1337 <priv.luk@gmail.com>
Co-authored-by: Steve Kondik <steve@cyngn.com>
Co-authored-by: HazouPH <jgrharbers@gmail.com>
Co-authored-by: Nick Reuter <nreuter85@gmail.com>
Change-Id: I8e8af90ac8fc7e96f73f2c68056de533d9157fa6