ath9k: Fix build failure

Make sure that CONFIG_ATH9K_BTCOEX_SUPPORT is used for
the WLAN/BT RX diversity hooks.

Reported by the kernel build testing backend.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c
index a155190..414584e 100644
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -270,6 +270,8 @@
 	.llseek = default_llseek,
 };
 
+#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
+
 static ssize_t read_file_bt_ant_diversity(struct file *file,
 					  char __user *user_buf,
 					  size_t count, loff_t *ppos)
@@ -323,6 +325,8 @@
 	.llseek = default_llseek,
 };
 
+#endif
+
 void ath9k_debug_stat_ant(struct ath_softc *sc,
 			  struct ath_hw_antcomb_conf *div_ant_conf,
 			  int main_rssi_avg, int alt_rssi_avg)
@@ -1935,11 +1939,11 @@
 			   sc->debug.debugfs_phy, &sc->sc_ah->gpio_mask);
 	debugfs_create_u32("gpio_val", S_IRUSR | S_IWUSR,
 			   sc->debug.debugfs_phy, &sc->sc_ah->gpio_val);
-	debugfs_create_file("bt_ant_diversity", S_IRUSR | S_IWUSR,
-			    sc->debug.debugfs_phy, sc, &fops_bt_ant_diversity);
 	debugfs_create_file("antenna_diversity", S_IRUSR,
 			    sc->debug.debugfs_phy, sc, &fops_antenna_diversity);
 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
+	debugfs_create_file("bt_ant_diversity", S_IRUSR | S_IWUSR,
+			    sc->debug.debugfs_phy, sc, &fops_bt_ant_diversity);
 	debugfs_create_file("btcoex", S_IRUSR, sc->debug.debugfs_phy, sc,
 			    &fops_btcoex);
 #endif