* infcmd.c (do_registers_info) [INVALID_FLOAT]: Only use if
defined.
* values.c (unpack_double) [INVALID_FLOAT]: Ditto.
* mips-tdep.c (mips_print_register): Don't test float validity.
* config/a29k/tm-a29k.h, config/alpha/tm-alpha.h,
config/arm/tm-arm.h, config/convex/tm-convex.h,
config/h8300/tm-h8300.h, config/h8500/tm-h8500.h,
config/i386/tm-i386v.h, config/i386/tm-sun386.h,
config/i960/tm-i960.h, config/m68k/tm-m68k.h,
config/m88k/tm-m88k.h, config/mips/tm-mips.h,
config/ns32k/tm-merlin.h, config/ns32k/tm-nbsd.h,
config/ns32k/tm-ns32km3.h, config/ns32k/tm-umax.h,
config/pa/tm-hppa.h, config/pyr/tm-pyr.h,
config/rs6000/tm-rs6000.h, config/sh/tm-sh.h,
config/sparc/tm-sparc.h, config/z8k/tm-z8k.h (INVALID_FLOAT):
Remove definition.
