Fix --tls-version-max in mbed TLS builds

Fix --tls-version-max in mbed TLS builds

These define renames were missed in the migration to 2.x, causing the
maximum TLS version to be detected incorrectly.

[DS: mbedTLS mapps supported SSL/TLS protocol version in the library
     through these macros.  TLSv1.1 = 3.2, TLSv1.2 = 3.3, etc ]

Signed-off-by: Steffan Karger <steffan@karger.me>
Acked-by: David Sommerseth <davids@openvpn.net>
Message-Id: <1478289824-9244-1-git-send-email-steffan@karger.me>
URL: http://www.mail-archive.com/search?l=mid&q=1478289824-9244-1-git-send-email-steffan@karger.me
Signed-off-by: David Sommerseth <davids@openvpn.net>