wpa_supplicant: Resolve secondary VAP association issue

Association will fail on a secondary open unprotected VAP when the
primary VAP is configured for WPA. Examples of secondary VAPs are,
hotels, universities, and commodity routers' guest networks.

A broadly similar bug was discussed on Red Hat's bugzilla affecting
association to a D-Link DIR-842.

This suggests that as IEs were added to the 802.11 protocol the old code
was increasingly inadaquate to handle the additional IEs, not only a
secondary VAP.

PR: 264238
Reported by: Jaskie <jiangjun12321@gmail.com>

		"J.R. Oldroyd" <fbsd@opal.com>

Submitted by: "J.R. Oldroyd" <fbsd@opal.com>
MFC after: 3 days