* alpha-tdep.c (alpha_dwarf2_init_abi): New.

    * alpha-tdep.c (alpha_dwarf2_init_abi): New.
        * alpha-tdep.h (alpha_dwarf2_init_abi): Declare it.
        * alpha-linux-tdep.c (alpha_linux_init_abi): Use it.
        * alphafbsd-tdep.c (alphafbsd_init_abi): Register dwarf2 and mdebug
        unwind routines.
        * alphanbsd-tdep.c (alphanbsd_init_abi): Likewise.
        * config/alpha/fbsd.mt (TDEPFILES): Add alpha-mdebug-tdep.o.
        * config/alpha/nbsd.mt (TDEPFILES): Likewise.

        * alpha-linux-tdep.c: Remove unnecessary includes.
        * Makefile.in (alpha-linux-tdep.o): Update.