Btrfs: consistent usage of types in balance_args

The btrfs_balance_args are only used for the balance ioctl, so use __u
instead of __le here for consistency. The __le usage was introduced in
bc309467 and dee32d0a and was probably a result of
copy/pasting when the code was written.

The usage of __le did not break anything, but it's unnecessary. Also,
this change makes the code less confusing for the careful reader.
Signed-off-by: NHans van Kranenburg <hans.van.kranenburg@mendix.com>
Reviewed-by: NDavid Sterba <dsterba@suse.com>
Signed-off-by: NDavid Sterba <dsterba@suse.com>

include/uapi/linux/btrfs.h

@@ -291,10 +291,10 @@ struct btrfs_ioctl_feature_flags {
 struct btrfs_balance_args {
 	__u64 profiles;
 	union {
-		__le64 usage;
+		__u64 usage;
 		struct {
-			__le32 usage_min;
-			__le32 usage_max;
+			__u32 usage_min;
+			__u32 usage_max;
 		};
 	};
 	__u64 devid;
@@ -324,8 +324,8 @@ struct btrfs_balance_args {
 	 * Process chunks that cross stripes_min..stripes_max devices,
 	 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
 	 */
-	__le32 stripes_min;
-	__le32 stripes_max;
+	__u32 stripes_min;
+	__u32 stripes_max;
 
 	__u64 unused[6];
 } __attribute__ ((__packed__));