Preparation for collapsing the two byte swaps adjust_endianness and
handle_bswap into the former.
Backports commit be5c4787e9a6eed12fd765d9e890f7cc6cd63220 from qemu
Convert memory_region_dispatch_{read|write} operand "unsigned size"
into a "MemOp op".
Backports commit e67c904668d82ca4416cd91d37d9f5abcceef747 from qemu
Introduce no-op size_memop to aid preparatory conversion of
interfaces.
Once interfaces are converted, size_memop will be implemented to
return a MemOp from size in bytes.
Backports commit 66b9b24375ac215cdcbdf9e14d665395360abff4 from qemu
Preparation for collapsing the two byte swaps, adjust_endianness and
handle_bswap, along the I/O path.
Target dependant attributes are conditionalized upon NEED_CPU_H.
Backports commit 14776ab5a12972ea439c7fb2203a4c15a09094b4 from qemu
