ath9k_htc: Add support for bluetooth coexistence.

Signed-off-by: Vivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/Makefile b/drivers/net/wireless/ath/ath9k/Makefile
index 973ae4f..4555e99 100644
--- a/drivers/net/wireless/ath/ath9k/Makefile
+++ b/drivers/net/wireless/ath/ath9k/Makefile
@@ -46,6 +46,7 @@
 		htc_drv_txrx.o \
 		htc_drv_main.o \
 		htc_drv_beacon.o \
-		htc_drv_init.o
+		htc_drv_init.o \
+		htc_drv_gpio.o
 
 obj-$(CONFIG_ATH9K_HTC) += ath9k_htc.o