LSM: Update function documentation for cap_capable

This should have gone in with commit
c1a85a00ea66cb6f0bd0f14e47c28c2b0999799f.

Signed-off-by: Micah Morton <mortonm@chromium.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
diff --git a/security/commoncap.c b/security/commoncap.c
index 188eaf5..f1d117c 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -57,7 +57,7 @@ static void warn_setuid_and_fcaps_mixed(const char *fname)
  * @cred: The credentials to use
  * @ns:  The user namespace in which we need the capability
  * @cap: The capability to check for
- * @audit: Whether to write an audit message or not
+ * @opts: Bitmask of options defined in include/linux/security.h
  *
  * Determine whether the nominated task has the specified capability amongst
  * its effective set, returning 0 if it does, -ve if it does not.