byteorder: Add buffer swap helpers

Two functions are proposed:
- sys_memcpy_swap(): will memcpy and swap the 2 given buffers
- sys_mem_swap(): will swap the buffer in place.

The idea is to propose 2 different functions optimized for 2 different
usage.

Change-Id: I1c23907c1f287b72d9be077ccf3aadbb8d379e71
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
1 file changed