[PATCH] ath10: Fix build with CONFIG_THERMAL=m

[Michal Marek]

After commit cf4f21938e13 ("kbuild: Allow to specify composite modules
with modname-m"), thermal.c gets included in the driver and the build
fails with

drivers/net/wireless/ath/ath10k/thermal.c:119:6: error: redefinition of ‘ath10k_thermal_event_temperature’
drivers/net/wireless/ath/ath10k/thermal.h:54:20: note: previous definition of ‘ath10k_thermal_event_temperature’ was here
drivers/net/wireless/ath/ath10k/thermal.c:136:6: error: redefinition of ‘ath10k_thermal_set_throttling’
drivers/net/wireless/ath/ath10k/thermal.h:59:20: note: previous definition of ‘ath10k_thermal_set_throttling’ was here
drivers/net/wireless/ath/ath10k/thermal.c:162:5: error: redefinition of ‘ath10k_thermal_register’
drivers/net/wireless/ath/ath10k/thermal.h:45:19: note: previous definition of ‘ath10k_thermal_register’ was here
drivers/net/wireless/ath/ath10k/thermal.c:216:6: error: redefinition of ‘ath10k_thermal_unregister’
drivers/net/wireless/ath/ath10k/thermal.h:50:20: note: previous definition of ‘ath10k_thermal_unregister’ was here

Change the #ifdef to reflect the new kbuild behavior.

Reported-by: kbuild test robot <fengguang.wu at intel.com>
Signed-off-by: Michal Marek <mmarek at suse.com>
---
 drivers/net/wireless/ath/ath10k/thermal.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath10k/thermal.h b/drivers/net/wireless/ath/ath10k/thermal.h
index b610ea5caae8..c9223e9e962f 100644
--- a/drivers/net/wireless/ath/ath10k/thermal.h
+++ b/drivers/net/wireless/ath/ath10k/thermal.h
@@ -36,7 +36,7 @@ struct ath10k_thermal {
 	int temperature;
 };
 
-#ifdef CONFIG_THERMAL
+#if IS_REACHABLE(CONFIG_THERMAL)
 int ath10k_thermal_register(struct ath10k *ar);
 void ath10k_thermal_unregister(struct ath10k *ar);
 void ath10k_thermal_event_temperature(struct ath10k *ar, int temperature);
-- 
2.1.4