cfg80211: Define macro to indicate support for update connect params

Define macro to indicate backport support for update connection
parameters when in connected state.

Change-Id: I175d76cd193d649f8b91cdab5000f6e1c66de15e
CRs-Fixed: 1097836
Signed-off-by: Vidyullatha Kanchanapally <vidyullatha@codeaurora.org>