ASoc: Add {get/set}_metadata ops for dynamic DAI links

Add {set/get}_metadata in soc compress framework for dynamic
FE DAI links.

Change-Id: I5e678a565d2d1a323f4cfed5dd6217ec2388100d
Signed-off-by: Haynes Mathew George <hgeorge@codeaurora.org>
Signed-off-by: Eric Laurent <elaurent@google.com>
Git-commit: bb563cf4b99e6d3e9c4dbb7c911e71c1e9c24b13
Git-repo: https://android.googlesource.com/kernel/msm


Signed-off-by: Dhananjay Kumar <dhakumar@codeaurora.org>