UPSTREAM: xtensa: Enable seccomp architecture tracking

To enable seccomp constant action bitmaps, we need to have a static
mapping to the audit architecture and system call table size. Add these
for xtensa.

Signed-off-by: YiFei Zhu <yifeifz2@illinois.edu>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/79669648ba167d668ea6ffb4884250abcd5ed254.1605101222.git.yifeifz2@illinois.edu


(cherry picked from commit 445247b0)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Bug: 176068146
Change-Id: I7f8ecb0da495552c062e39e1b9bd5ba0aace3b01