ext4: remove unnecessary double parentheses

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --cc fs/ext4/extents.c
Simple merge

diff --cc fs/ext4/inode.c
Simple merge

diff --cc fs/ext4/migrate.c
Simple merge

diff --cc fs/ext4/super.c
Simple merge

diff --cc fs/ext4/xattr.c
Simple merge