platform/x86: huawei-wmi: use sysfs_emit() instead of sprintf()

Follow the advice in Documentation/filesystems/sysfs.rst:
show() should only use sysfs_emit() or sysfs_emit_at() when formatting
the value to be returned to user space.
Signed-off-by: Ai Chao <aichao@kylinos.cn>
Link: https://lore.kernel.org/r/20240319064243.297320-1-aichao@kylinos.cnReviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/x86/huawei-wmi.c

@@ -379,7 +379,7 @@ static ssize_t charge_control_start_threshold_show(struct device *dev,
 	if (err)
 		return err;
 
-	return sprintf(buf, "%d\n", start);
+	return sysfs_emit(buf, "%d\n", start);
 }
 
 static ssize_t charge_control_end_threshold_show(struct device *dev,
@@ -392,7 +392,7 @@ static ssize_t charge_control_end_threshold_show(struct device *dev,
 	if (err)
 		return err;
 
-	return sprintf(buf, "%d\n", end);
+	return sysfs_emit(buf, "%d\n", end);
 }
 
 static ssize_t charge_control_thresholds_show(struct device *dev,
@@ -405,7 +405,7 @@ static ssize_t charge_control_thresholds_show(struct device *dev,
 	if (err)
 		return err;
 
-	return sprintf(buf, "%d %d\n", start, end);
+	return sysfs_emit(buf, "%d %d\n", start, end);
 }
 
 static ssize_t charge_control_start_threshold_store(struct device *dev,
@@ -562,7 +562,7 @@ static ssize_t fn_lock_state_show(struct device *dev,
 	if (err)
 		return err;
 
-	return sprintf(buf, "%d\n", on);
+	return sysfs_emit(buf, "%d\n", on);
 }
 
 static ssize_t fn_lock_state_store(struct device *dev,