* vaxbsd-nat.c: Include "target,h" and "inf-ptrace.h".

* vaxbsd-nat.c: Include "target,h" and "inf-ptrace.h".
(vaxbsd_fetch_inferior_registers): Rename from
fetch_inferior_registers.  Make static.
(vaxbsd_store_inferior_registers): Rename from
store_inferior_registers.  Make static.
(_initialize_vaxbsd_nat): Construct and add target vector.
* config/vax/nbsdaout.mh (NATDEPFILES): Remove infptrace.o and
inftarg.o.  Add inf-child.o and inf-ptrace.o.
* config/vax/nbsdelf.mh (NATDEPFILES): Remove infptrace.o and
inftarg.o.  Add inf-child.o and inf-ptrace.o.
(NAT_FILE): Remove.
* config/vax/obsd.mh (NATDEPFILES): Remove infptrace.o and
inftarg.o.  Add inf-child.o and inf-ptrace.o.
(NAT_FILE): Remove.
* Makefile.in (vaxbsd-nat.o): Update dependencies.