constify tables in kernel/sysctl_check.c

Remains the question whether it is intended that many, perhaps even large,
tables are compiled in without ever having a chance to get used, i.e.
whether there shouldn't #ifdef CONFIG_xxx get added.

[akpm@linux-foundation.org: fix cut-n-paste error]
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>