h8300.md: Remove "type" attribute from all patterns except those which have varying...

        * h8300/h8300.md: Remove "type" attribute from all patterns
        except those which have varying length branches.  Eliminate
        obsolete "type" attributes.  Add additional comments about insn
        length computation problems and further optimizations.  Add
        "length" and "cc" attributes to insns without them, fix a few
        length computations.  Remove patterns which are commented out.

        * h8300/h8300.md (zero extension expanders and insns): Simplify,
        fix various length problems, provide optimized versions for the
        h8300 and h8300h.
        (sign extension expanders and insns): Likewise.  Make them
        nearly identical to zero_extension patterns and insns.

From-SVN: r11849