camcontrol: No need to set CAM_ARG_[PG]LIST in defects

[imp]

Summary

We can or in the the list_format bits directly if we or in the
list_format when we look it up the first time. Free up CAM_ARG_[PG]LIST
from the CAM_ARG_xxx enum.

Sponsored by: Netflix

[mav]

sbin/camcontrol/camcontrol.c

3864

I suppose this will give unexpected result if -f specified twice.

[imp]

sbin/camcontrol/camcontrol.c

3864

So do I do last one wins like before, or a if (list_type_set) errx()?

[mav]

sbin/camcontrol/camcontrol.c

3864

Either would be good to me.

[imp]

update, per review