asoc: ignore enable commands if state already matches

Break without setting rc to error code causes param_id=0 sent to certain
effect module in adsp, If enable flag state for the module is same as
the requested state, ignore the command and continue with next command
to avoid sending param_id=0 to ADSP.

CRs-Fixed: 2478482
Change-Id: I6cddf6f5156562d2c5d6aa6163881992bfa55eeb
Signed-off-by: Weiyin Jiang <wjiang@codeaurora.org>