Set default scan IEs to the driver (QCA vendor extension)

This makes wpa_supplicant set default scan IEs to the driver (if the
vendor command is supported). The driver can use these IEs in the scan
requests initiated by the driver itself. Also the driver can merge these
IEs into further scan requests that it receives, in case if the scan
request doesn't carry any of the IEs sent in this command.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Git-commit: cc9985d1b1a844fddbc042abe8c4f5036c0d410b
Git-repo: git://w1.fi/srv/git/hostap.git
Change-Id: I21e8e31c50bb14903a14a2419a6eb5f4ae8841ef
CRs-Fixed: 1049832
10 files changed