drivers: soc: qcom: enable fsa device for audio use case

Set Device_Enable bit in FSA4480 switch setting register
so that the switch nodes will be out of high-z state
allowing audio data to flow through it.

Change-Id: Iec4cbb57fd1bae3dbb804bf217af62d7d74b8d18
Signed-off-by: Karthikeyan Mani <kmani@codeaurora.org>