platform : msm-geni-se: fix voting unit for bus bandwidth

Bandwidth vote values were being applied as Bytes-per-second but
the interconnect framework expects Kilobytes-per-second units. Fix
the error by using unit conversion macros provided by the
interconnect interface.

Change-Id: If2e921b7213e7f61459930b9739c6fa0c0257bf9
Signed-off-by: Mukesh Kumar Savaliya <msavaliy@codeaurora.org>
Signed-off-by: Akash Asthana <akashast@codeaurora.org>