[WCNCR00146539] regd: add radar_detection hook for linux kernel below 3.15

[Description]
Add cfg80211_ops start_radar_detection hook for linux kernel below
3.15.0. Before 3.15.0, the third parameter cac_time_ms is absent.

Change-Id: Ib092ee8db1ba08a806cfb996d839ff3b388cc48b
Feature: regd
Signed-off-by: Awk Jiang <awk.jiang@mediatek.com>
CR-Id: WCNCR00146539
2 files changed