* Makefile.in (vax-tdep.o): Add $(arch_utils_h), $(inferior_h),

* Makefile.in (vax-tdep.o): Add $(arch_utils_h), $(inferior_h),
and vax-tdep.h.
* vax-tdep.h: New file.
* vax-tdep.c: Include inferior.h, arch-utils.h, and vax-tdep.h.
Make several routines static.
(vax_get_saved_register): New function.
(vax_gdbarch_init): New function.
(_initialize_vax_tdep): Register vax_gdbarch_init.
* config/vax/tm-vax.h: Set GDB_MULTI_ARCH to GDB_MULTI_ARCH_PARTIAL.
Remove macros now under the control of gdbarch.