ext2: Use lowercase names of quota functions

Use lowercase names of quota functions instead of old uppercase ones.

Signed-off-by: Jan Kara <jack@suse.cz>
CC: linux-ext4@vger.kernel.org

diff --cc fs/ext2/balloc.c
Simple merge

diff --cc fs/ext2/ialloc.c
Simple merge

diff --cc fs/ext2/inode.c
Simple merge

diff --cc fs/ext2/xattr.c
Simple merge