Draft: Build CIS files and keyspan_pda firmware from source
We already build most firmware from source, but omitted the CIS files and keyspan_pda firmware because the ihex2fw and pack_cis command weren't packaged. That is no longer the case.
- d/control: Build-Depend on cis-tools, linux-misc-tools
- d/rules: Clean and build in cis and keyspan_pda directories
Closes: #890601