xfrm: remove hdr_offset indirection
After previous patches all remaining users set the function pointer to the same function: xfrm6_find_1stfragopt. So remove this function pointer and call ip6_find_1stfragopt directly. Reduces size of xfrm_type to 64 bytes on 64bit platforms. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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