soc: qcom: bam_dmux: Abort open/close cmd during SSR

BAM DMUX clients are calling close when modem is in SSR state which
can cause BAM HW registers access when clocks are off.

Bail out open and close operation in SSR case.

CRs-Fixed: 2288122
Change-Id: Id8cb08aab34b135f17241df76e3726488448999f
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>