drivers: soc: qcom: Add bam dmux smem state handling

Add correct bam demux device tree node members describing
the shared memory in, out bound states as per 4.14 SMSM
driver. Port bam dmux driver code to handle out bound
shared memory state and hadnle in bound state change in
interrupt handler.

Change-Id: Idb57aaddb4987416fdc9ca9a3f754272f4a94748
Signed-off-by: Sudharsan Reddy Yettapu <syepattu@codeaurora.org>
Signed-off-by: Sivasri Kumar Vanka <sivasri@codeaurora.org>