replace [...]_write_pc methods by pc_regnum gdbarch value?

[Joel Brobecker]

> > gdb/ChangeLog:
> > 
> >         * m32r-tdep.c (m32r_write_pc): Delete.
> >         (m32r_gdbarch_init): Remove call to set_gdbarch_write_pc.
> >         Add call to set_gdbarch_pc_regnum.
> > 
> > gdb/ChangeLog:
> > 
> >         * mep-tdep.c (mep_write_pc): Delete.
> >         (mep_gdbarch_init): Remove call to set_gdbarch_write_pc.
> >         Add call to set_gdbarch_pc_regnum.

> Your changes look good to me.  Feel free to check it in.  If there's
> any breakage, in those targets, I'll fix them.

Thanks, Kevin. Now checked in.

-- 
Joel