btrfs: use bool argument in free_root_pointers()

btrfs: use bool argument in free_root_pointers()

BugLink: https://bugs.launchpad.net/bugs/1866678
[ Upstream commit 4273eaff9b8d5e141113a5bdf9628c02acf3afe5 ]

We don't need int argument bool shall do in free_root_pointers().  And
rename the argument as it confused two people.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>