DPP: Extend DPP_PKEX_ADD ver=<1/2> to cover Responder role

Allow PKEX v1-only or v2-only behavior to be specific for the Responder
role. This is mainly for testing purposes.

Signed-off-by: Jouni Malinen <quic_jouni@quicinc.com>

src/common/dpp.h

@@ -172,6 +172,12 @@ struct dpp_bootstrap_info {
 
 #define PKEX_COUNTER_T_LIMIT 5
 
+enum dpp_pkex_ver {
+	PKEX_VER_AUTO,
+	PKEX_VER_ONLY_1,
+	PKEX_VER_ONLY_2,
+};
+
 struct dpp_pkex {
 	void *msg_ctx;
 	unsigned int initiator:1;