net: fill in MODULE_DESCRIPTION()s for af_key

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Add descriptions to the PF_KEY socket helpers.

Signed-off-by: Breno Leitao <[e-mail]>
Reviewed-by: Simon Horman <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

net/key/af_key.c

···
 
 module_init(ipsec_pfkey_init);
 module_exit(ipsec_pfkey_exit);
+MODULE_DESCRIPTION("PF_KEY socket helpers");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_NETPROTO(PF_KEY);