wolfssl: WOLFSSL_HAS_WPAS requires WOLFSSL_HAS_DH

Without this, WOLFSSL_HAS_DH can be disabled even if WOLFSSL_HAS_WPAS is
enabled, resulting in an "Anonymous suite requires DH" error when trying
to compile wolfssl.
Signed-off-by: NPascal Ernster <git@hardfalcon.net>
Reviewed-by: NEneas U de Queiroz <cotequeiroz@gmail.com>

package/libs/wolfssl/Config.in

@@ -43,6 +43,7 @@ config WOLFSSL_HAS_OCSP
 config WOLFSSL_HAS_WPAS
 	bool "Include wpa_supplicant support"
 	select WOLFSSL_HAS_ARC4
+	select WOLFSSL_HAS_DH
 	select WOLFSSL_HAS_OCSP
 	select WOLFSSL_HAS_SESSION_TICKET
 	default y