newbus: Remove redundant check for 0

[imp]

Summary

We already checked to see if the return code is 0 above. This code is
redundant.

Sponsored by: Netflix

[imp]

actually fix the redundancy

[imp]

sys/kern/subr_bus.c

1670

I suppose this line could also be dropped.

1751

Maybe we finally need to implement strdup above.

[jhb]

sys/kern/subr_bus.c

1670

Yes, you can drop pri == 0

1671

out is ok, but you could also use something like exact_match or some other name for the label.

1751

Lots of description strings are constants rather than dynamically allocated. I don't think it would matter if we started always dynamically allocating them though.