* 1750a.h (DBX_REGISTER_NUMBER): Don't define.
	* alpha.h (DBX_REGISTER_NUMBER): Likewise.
	* arc.h (DBX_REGISTER_NUMBER): Likewise.
	* arm/aout.h (DBX_REGISTER_NUMBER): Likewise.
	* avr.h (DBX_REGISTER_NUMBER): Likewise.
	* c4x.h (DBX_REGISTER_NUMBER): Likewise.
	* clipper.h (DBX_REGISTER_NUMBER): Likewise.
	* convex.h (DBX_REGISTER_NUMBER): Likewise.
	* cris.h (DBX_REGISTER_NUMBER): Likewise.
	* dsp16xx.h (DBX_REGISTER_NUMBER): Likewise.
	* elxsi.h (DBX_REGISTER_NUMBER): Likewise.
	* fr30.h (DBX_REGISTER_NUMBER): Likewise.
	* h8300.h (DBX_REGISTER_NUMBER): Likewise.
	* i370.h (DBX_REGISTER_NUMBER): Likewise.
	* i860.h (DBX_REGISTER_NUMBER): Likewise.
	* i860/paragon.h (DBX_REGISTER_NUMBER): Likewise.
	* i860/sysv3.h (DBX_REGISTER_NUMBER): Likewise.
	* i860/sysv4.h (DBX_REGISTER_NUMBER): Likewise.
	* m32r.h (DBX_REGISTER_NUMBER): Likewise.
	* m68hc11.h (DBX_REGISTER_NUMBER): Likewise.
	* m88k.h (DBX_REGISTER_NUMBER): Likewise.
	* mcore/mcore-elf.h (DBX_REGISTER_NUMBER): Likewise.
	* mcore.h (DBX_REGISTER_NUMBER): Likewise.
	* mn10200.h (DBX_REGISTER_NUMBER): Likewise.
	* mn10300.h (DBX_REGISTER_NUMBER): Likewise.
	* pdp11.h (DBX_REGISTER_NUMBER): Likewise.
	* romp.h (DBX_REGISTER_NUMBER): Likewise.
	* rs6000.h (DBX_REGISTER_NUMBER): Likewise.
	* rs6000/sysv4.h (DBX_REGISTER_NUMBER): Likewise.
	* s390/linux.h (DBX_REGISTER_NUMBER): Likewise.
	* stormy16.h (DBX_REGISTER_NUMBER): Likewise.
	* v850.h (DBX_REGISTER_NUMBER): Likewise.
	* vax.h (DBX_REGISTER_NUMBER): Likewise.
	* we32k.h (DBX_REGISTER_NUMBER): Likewise.

	* defaults.h (DBX_REGISTER_NUMBER): Provide a default.
	* doc/tm.texi (DBX_REGISTER_NUMBER): Update.

From-SVN: r47256