ath9k: qualify global modparam_nohwcrypt variable

Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index a818e4f..f90a6ca 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1829,7 +1829,7 @@
 	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 	int ret = 0;
 
-	if (modparam_nohwcrypt)
+	if (ath9k_modparam_nohwcrypt)
 		return -ENOSPC;
 
 	mutex_lock(&sc->mutex);