xfrm: remove decode_session indirection from afinfo_policy

No external dependencies, might as well handle this directly.
xfrm_afinfo_policy is now 40 bytes on x86_64.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
4 files changed