kernel/sysctl.c: avoid annoying warnings

Some of the limit constants are used only depending on some complex
configuration dependencies, yet it's not worth making the simple
variables depend on those configuration details.  Just mark them as
perhaps not being unused, and avoid the warning.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

kernel/sysctl.c

@@ -97,8 +97,8 @@ static int neg_one = -1;
 #endif
 
 static int zero;
-static int one = 1;
-static int two = 2;
+static int __maybe_unused one = 1;
+static int __maybe_unused two = 2;
 static unsigned long one_ul = 1;
 static int one_hundred = 100;