arch: arc: add sys_write64/sys_read64 functions

Added sys_read64 and sys_write64 functions for 64-bit memory
operations when building for 64-bit.

Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
Signed-off-by: Yong Cong Sin <ycsin@meta.com>
Signed-off-by: Yong Cong Sin <yongcong.sin@gmail.com>
1 file changed