net/wireless: Support to disable CCK rate for management frame

Provision to distinguish the P2P scan and the normal scan
with no_cck flag and thus disable the 11b rates for
p2p scan.

Change-Id: Ia4073a5f926c6ac97dffdee99f54ba53535fea85
Signed-off-by: Sunil Dutt <Undekari&lt;duttus@codeaurora.org>