wifi: ath: Convert sprintf/snprintf to sysfs_emit

Per filesystems/sysfs.rst, show() should only use sysfs_emit()
or sysfs_emit_at() when formatting the value to be returned to user space.

coccinelle complains that there are still a couple of functions that use
snprintf(). Convert them to sysfs_emit().

sprintf() will be converted as weel if they have.

Generally, this patch is generated by
make coccicheck M=<path/to/file> MODE=patch \
COCCI=scripts/coccinelle/api/device_attr_show.cocci

No functional change intended

CC: Kalle Valo <[email protected]>
CC: Jeff Johnson <[email protected]>
CC: [email protected]
CC: [email protected]
CC: [email protected]
Signed-off-by: Li Zhijian <[email protected]>

Signed-off-by: Kalle Valo <[email protected]>
Link: https://msgid.link/[email protected]

drivers/net/wireless/ath/ath10k/thermal.c

@@ -100,7 +100,7 @@ static ssize_t ath10k_thermal_show_temp(struct device *dev,
 	spin_unlock_bh(&ar->data_lock);
 
 	/* display in millidegree celsius */
-	ret = snprintf(buf, PAGE_SIZE, "%d\n", temperature * 1000);
+	ret = sysfs_emit(buf, "%d\n", temperature * 1000);
 out:
 	mutex_unlock(&ar->conf_mutex);
 	return ret;

drivers/net/wireless/ath/ath11k/thermal.c

@@ -101,7 +101,7 @@ static ssize_t ath11k_thermal_show_temp(struct device *dev,
 	spin_unlock_bh(&ar->data_lock);
 
 	/* display in millidegree Celsius */
-	ret = snprintf(buf, PAGE_SIZE, "%d\n", temperature * 1000);
+	ret = sysfs_emit(buf, "%d\n", temperature * 1000);
 out:
 	mutex_unlock(&ar->conf_mutex);
 	return ret;