Add getdents, rmdir, chdir, and mknod to SE mode for x86. Change-Id: I387ea3066869e8999bc0064f74070f4e47c1e9a1 Reviewed-on: https://gem5-review.googlesource.com/12112 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>