rsi_hw_iface: names of krl files are too long

[gavanderhoorn]

As reported by @pgorczak in #46 (comment):

[..] however their filenames are too long, creating untraceable errors (it was a hunch of a colleague to make the filenames shorter and lo, it fixed them)

This needs to be fixed.

[gavanderhoorn]

@tingelst: is this something that you were going to address as well? Otherwise we could import the changes made by @pgorczak.

[pgorczak]

If not, I'll prepare a PR

[tingelst]

@gavanderhoorn I think we can start by importing the changes by @pgorczak .

@pgorczak What kind of errors have you encountered?

[pgorczak]

@tingelst my bets are on #48

[gavanderhoorn]

@pgorczak: could I ask you to make a PR for this?

[pgorczak]

@gavanderhoorn will do