Process QCA_NL80211_VENDOR_SUBCMD_KEY_MGMT_ROAM_AUTH after NL80211_CMD_ROAM

Process QCA_NL80211_VENDOR_SUBCMD_KEY_MGMT_ROAM_AUTH after NL80211_CMD_ROAM

NL80211_CMD_ROAM indication is scheduled via a kernel work queue, while
QCA_NL80211_VENDOR_SUBCMD_KEY_MGMT_ROAM_AUTH is a vendor event from the
driver. Thus, a race condition can exist wherein the vendor event is
received prior to the NL80211_CMD_ROAM indication.

The processing of this vendor event depends on the NL80211_CMD_ROAM
indication to update the roamed BSS/BSSID information and thus the out
of sequence processing of these events would result in not updating the
right BSS information.

This commit adds a workaround to hold the pending
QCA_NL80211_VENDOR_SUBCMD_KEY_MGMT_ROAM_AUTH event for up to 100 ms in
case NL80211_CMD_ROAM is not received first.

Signed-off-by: Purushottam Kushwaha <pkushwah@codeaurora.org>