net: af_key: check encryption module availability consistency

stable inclusion
from stable-4.19.246
commit 539d5deba06e0700807840e8d77507fcb6e4be3c
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5FNPY


CVE: NA

--------------------------------

[ Upstream commit 015c44d7 ]

Since the recent introduction supporting the SM3 and SM4 hash algos for IPsec, the kernel
produces invalid pfkey acquire messages, when these encryption modules are disabled. This
happens because the availability of the algos wasn't checked in all necessary functions.
This patch adds these checks.

Signed-off-by: Thomas Bartschies <thomas.bartschies@cvk.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Yongqiang Liu <liuyongqiang13@huawei.com>
Signed-off-by: Laibin Qiu <qiulaibin@huawei.com>