cfg80211: Indicate support for AKM advertisement per interface

Define macro to indicate backport support for advertising supported
AKMs per interface type.

Change-Id: I335c458f2a188a9c0a85c7a2ce09603535d0eb64
CRs-Fixed: 2743940
Signed-off-by: Veerendranath Jakkam <vjakkam@codeaurora.org>