drivers: soc: qcom: notify of only usb audio plugs

Notify to FSA driver clients only if it is a audio
accessory plug. Add other type of accessory plug that
FSA driver should notify of if any in the switch condition.

Change-Id: I094835f5bfb950c60c89163443a25849dd0b5b52
Signed-off-by: Karthikeyan Mani <kmani@codeaurora.org>