KEYS: Drop the permissions argument from __keyring_search_one()

Drop the permissions argument from __keyring_search_one() as the only caller
passes 0 here - which causes all checks to be skipped.

Signed-off-by: David Howells <dhowells@redhat.com>

diff --cc security/keys/internal.h
Simple merge

diff --cc security/keys/key.c
Simple merge

diff --cc security/keys/keyring.c
Simple merge