ath9k_hw: Add a HW callback to set diversity

This patch adds a new callback to handle WLAN RX diversity for
AR9565.

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/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index c40e901..1ac2e5c 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -24,6 +24,7 @@
 #include "rc.h"
 #include "ar9003_mac.h"
 #include "ar9003_mci.h"
+#include "ar9003_phy.h"
 #include "debug.h"
 #include "ath9k.h"
 
@@ -2025,6 +2026,9 @@
 
 	ath9k_hw_apply_gpio_override(ah);
 
+	if (AR_SREV_9565(ah) && ah->shared_chain_lnadiv)
+		REG_SET_BIT(ah, AR_BTCOEX_WL_LNADIV, AR_BTCOEX_WL_LNADIV_FORCE_ON);
+
 	return 0;
 }
 EXPORT_SYMBOL(ath9k_hw_reset);