net/tls: move tls_build_proto() on init path

Move tls_build_proto() so that TOE offload doesn't have to call it
mid way through its bypass enable path.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>