btrfs: use a single if() statement for one outcome in get_block_rsv()

Rather than have three separate if() statements for the same outcome
we should just OR them together in the same if() statement.

Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Alexandru Moise <00moses.alexander00@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
1 file changed