[BUG]
There is a small device size misalignment between the super block device
size and the device extent size:
total_bytes             10737418240 	<<<
bytes_used              15097856
dev_item.total_bytes    10737418240
dev_item.bytes_used     1094713344

        item 0 key (DEV_ITEMS DEV_ITEM 1) itemoff 16185 itemsize 98
                devid 1 total_bytes 1095761920 bytes_used 1094713344
				    ^^^^^^^^^^

[CAUSE]
In fixup_device_size(), we only reset superblock device item size, which
will be overwritten in write_dev_supers() using
btrfs_device::total_bytes.

And it doesn't touch btrfs_superblock::total_bytes either.

[FIX]
So fix the small mismatch by also resetting btrfs_device::total_bytes,
btrfs_device::bytes_used and btrfs_superblock::total_bytes.

Signed-off-by: Qu Wenruo <wqu@suse.com>