Rename cpu m32r to m32rb to distinguish from architecture name.

	Rename cpu m32r to m32rb to distinguish from architecture name.
	* Makefile.in (mloop.c): cpu m32r renamed to m32rb.
	(stamp-cpu): Ditto.
	* sim-main.h (WANT_CPU_M32RB): Renamed from WANT_CPU_M32R.
	* tconfig.in (WANT_CPU_M32RB): Ditto.
	* m32r.c (WANT_CPU_M32RB): Ditto.
	(*): m32r_ cpu fns renamed to m32rb_.
	* sim-if.c (sim_stop,sim_sync_stop,sim_resume): Update.
	* arch.h,arch.c: Regenerate.
	* cpu.c,cpu.h,decode.c,decode.h,extract.c,model.c: Regenerate.
	* sem-switch.c,sem.c: Regenerate.

	* sim-if.c (sim_open): Don't allocate memory on top of any user
	specified memory.
	(h_gr_get,h_gr_set): Delete.
	* sim-main.h (h_gr_get,h_gr_set): Delete.
	* traps.c (m32r_trap): Replace calls to h_gr_[gs]et with
	a_m32r_h_gr_[gs]et.