ext4: Add printk priority levels to clean up checkpatch warnings

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

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

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

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

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

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

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

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