Simplify EVP_PKEY_asn1_find()

Simplify EVP_PKEY_asn1_find()

EVP_PKEY_asn1_find() finds the EVP_PKEY_ASN1_METHOD underlying the method
or alias with nid (or, rather, pkey_id) passed in. Now that we have the
base method stored in a pointer, we can return that method after a simple
lookup of said nid (or, rather, pkey_id).

ok jsing