nl80211: add strict start type

Add a strict start type so all new attributes starting from
NL80211_ATTR_HE_OBSS_PD are validated strictly.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

net/wireless/nl80211.c

@@ -290,6 +290,7 @@ he_obss_pd_policy[NL80211_HE_OBSS_PD_ATTR_MAX + 1] = {
 };
 
 const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
+	[0] = { .strict_start_type = NL80211_ATTR_HE_OBSS_PD },
 	[NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 	[NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 				      .len = 20-1 },