quota: convert dquot_claim_space_nodirty() to return void

dquot_claim_space_nodirty() always return zero, let's convert it
to return void, then, its caller can get rid of handling failure
case.

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20231210025028.3262900-1-chao@kernel.org>