linux-phytec-ti

samples: Unrename SECCOMP_RET_KILL

Since samples can still be built before header installs, avoid the
cosmetic renaming of SECCOMP_RET_KILL to avoid build failures in -next.

Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Kees Cook <keescook@chromium.org>