* m68hc11-tdep.c (m68hc11_frame_args_address): Fix args address
computation.
(m68hc11_frame_init_saved_regs): Frame pointer is saved only if
the symbol exist.
(m68hc11_analyze_instruction): New function.
(m6811_prologue, m6812_prologue): New prologue description tables.
(m68hc11_guess_from_prologue): Use the above.
(m68hc11_gdbarch_init): Setup gdbarch_tdep for the prologue
descriptions.
* configure.tgt: Recognize the 68hc11.
* m68hc11-tdep.c: New file for 68hc11 target.
* config/m68hc11/m68hc11.mt: New file for 68hc11 port.
* configure.tgt: When 68hc11, set gdb_multi_arch.