Staging: pohmelfs: fix build breakage

drivers/staging/pohmelfs/inode.c:982: error: implicit declaration of
function 'DQUOT_TRANSFER'

Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>