* hppabsd-nat.c: Update copyright year. Include "target.h" and

* hppabsd-nat.c: Update copyright year.  Include "target.h" and
"inf-ptrace.h".
(hppabsd_fetch_registers): Renamed from fetch_inferior_registers;
made static.
(hppabsd_store_registers): Renamed from store_inferior_registers;
made static.
(_initialize_hppabsd_nat): New function and prototype.
* config/pa/obsd.mh (NATDEPFILES): Remove infptrace.o and
inftarg.o.  Add inf-ptrace.o.
(NAT_FILE): Remove.
* Makefile.in (hppabsd-nat.o): Update dependencies.