interconnect: qcom: Don't vote using unrelated voters in sync_state

Currently, when sync_state re-votes to remove the init proxies, it
re-votes each voter for each BCM. However, each BCM is associated with
exactly one voter, so we only need to re-vote using the single voter
associated with the BCM. Not only does this improve performance by
removing unnecessary votes, but it can also fix stability issues when
the voter RSC isn't available yet.

Change-Id: Id2de6959ffb17b10c9e88d31308fd22964c3e456
Signed-off-by: Mike Tipton <mdtipton@codeaurora.org>