mn10300.c (expand_epilogue): Restore registers in the "ret" instruction instead of a separate movm instruction.

        * mn10300/mn10300.c (expand_epilogue): Restore registers in the
        "ret" instruction instead of a separate movm instruction.
        Support possible stack deallocation in "ret" instruction too.
        * mn10300.md (return_internal): Use "ret" instead of "rets";
        restore registers and deallocate stack as needed.
        (load_movm): Delete unused pattern.

        * mn10300/mn10300.h (SMALL_REGISTER_CLASSES): Define.

From-SVN: r13311