hwmon: cleanup non-bool "valid" data fields

We have bool so use it consistently in all the drivers.

The following Coccinelle script was used:

@@
identifier T;
type t = { char, int };
@@
struct T {
...
-	t valid;
+	bool valid;
...
}

@@
identifier v;
@@
(
- v->valid = 0
+ v->valid = false
|
- v->valid = 1
+ v->valid = true
)

followed by sed to fixup the comments:
sed '/bool valid;/{s/!=0/true/;s/zero/false/}'

Few whitespace changes were fixed manually. All modified drivers were
compile-tested.

Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Link: https://lore.kernel.org/r/20210924195202.27917-1-fercerpav@gmail.com
[groeck: Fixed up 'u8 valid' to 'boool valid' in atxp1.c]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
diff --git a/drivers/hwmon/gl520sm.c b/drivers/hwmon/gl520sm.c
index 4ae1295..096ba97 100644
--- a/drivers/hwmon/gl520sm.c
+++ b/drivers/hwmon/gl520sm.c
@@ -64,7 +64,7 @@ struct gl520_data {
 	struct i2c_client *client;
 	const struct attribute_group *groups[3];
 	struct mutex update_lock;
-	char valid;		/* zero until the following fields are valid */
+	bool valid;		/* false until the following fields are valid */
 	unsigned long last_updated;	/* in jiffies */
 
 	u8 vid;
@@ -174,7 +174,7 @@ static struct gl520_data *gl520_update_device(struct device *dev)
 		}
 
 		data->last_updated = jiffies;
-		data->valid = 1;
+		data->valid = true;
 	}
 
 	mutex_unlock(&data->update_lock);