Added support to crashdump for rx65n on sbram Board specific code moved to boards directory and ipv6 support added
This directory contains header files common to all SH architectures. Sub-directories within this directory contain header files unique to specific SH chip architectures. At configuration time, additional directories will be linked here: 'build' will be a link to the boards/renesas/<chip>/<board>/include directory; 'chip' will be a link to the SH chip sub-directory.