linux-imx

keys: sparse: Fix kdoc mismatches

Fix some kdoc argument description mismatches reported by sparse and give
keyring_restrict() a description.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: James Morris <jamorris@linux.microsoft.com>
cc: Mat Martineau <mathew.j.martineau@linux.intel.com>