msm: npu: Add support to get/set property

Allow user app to retrieve/modify driver or fw properties.
This change is to allow user to set/get npu DCVS setting
via get/set_property apis.

Change-Id: I49cbbdba0c6d82617540d3a5a8b010ab2b40f697
Signed-off-by: Da Hoon Pyun <dpyun@codeaurora.org>