ASoC: sdm660: fix clock refcount for MI2S shutdown

For MI2S shutdown, if clock disable fails,
do not increment clock reference. Otherwise,
next time when startup is called, clock enable will not
be called again, so use case will not work.

CRs-Fixed: 2200021
Change-Id: Ic1b6f238e55a58ca1993049468cf13f13d80b9f4
Signed-off-by: Soumya Managoli <smanag@codeaurora.org>