vfs: 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: Alexander Viro <viro@zeniv.linux.org.uk>

diff --cc fs/attr.c
Simple merge

diff --cc fs/inode.c
Simple merge

diff --cc fs/namei.c
Simple merge

diff --cc fs/open.c
Simple merge

diff --cc fs/super.c
Simple merge

diff --cc fs/sync.c
Simple merge