soc: swr-mstr: return when requesting hw vote fails

SSR notification may not come to swr master control
in time and cause swrm_runtime_resume tries to access
SWR registers. Update the logic to return when requesting
hw vote fails.

Change-Id: Ia85e9ce540ff88d16e8e73c48bab26fb277b86bb
Signed-off-by: Meng Wang <mengw@codeaurora.org>