* amd64-tdep.c (amd64_return_value): Revert previous change

    * amd64-tdep.c (amd64_return_value): Revert previous change
        that used TYPE_LENGTH directly.
        * bfin-tdep.c (bfin_extract_return_value): Likewise.
        (bfin_store_return_value): Likewise.
        * cris-tdep.c (cris_store_return_value): Likewise.
        (cris_extract_return_value): Likewise.
        * h8300-tdep.c (h8300_extract_return_value): Likewise.
        * hppa-tdep.c (hppa64_return_value): Likewise.
        * lm32-tdep.c (lm32_store_return_value): Likewise.
        * microblaze-tdep.c (microblaze_store_return_value): Likewise.
        * spu-tdep.c (spu_value_from_register): Likewise.
        * vax-tdep.c (vax_return_value): Likewise.