Replace ECDH_KDF_X9_62() with internal ecdh_KDF_X9_63()
Signed-off-by: NAntoine Salon <asalon@vmware.com>
Reviewed-by: NMatt Caswell <matt@openssl.org>
Reviewed-by: NNicola Tuveri <nic.tuv@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/7345)

(cherry picked from commit ffd89124bdfc9e69349492c3f15383bb35520a11)