regulatory: use proper enum return value

get_reg_request_treatment() returns 0 in one case but is
defined to return an enum, use the proper value REG_REQ_OK.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index e1d6749..5a24c98 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -1345,7 +1345,7 @@
 				return REG_REQ_OK;
 			return REG_REQ_ALREADY_SET;
 		}
-		return 0;
+		return REG_REQ_OK;
 	case NL80211_REGDOM_SET_BY_DRIVER:
 		if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
 			if (regdom_changes(pending_request->alpha2))