ubifs: dump_lpt_leb: remove return at end of void function

Noticed that there is a useless return statement at the end of void
function dump_lpt_leb().
Just removing it.

Signed-off-by: Pintu Kumar <quic_pintu@quicinc.com>
Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>