qcom-geni-se: Geni common driver ICB vote logic changes

Use separate DDR and Corex/2x paths to put ICB vote.
Geni common driver aggregates the avg bandwidth put by individual
drivers to vote for DDR path bus bandwidth and for corex/core2x
separately. Common driver takes Instantaneous bandwidth put by
individual drivers also into consideration to put vote to ICB
driver for required bandwidth.

Change-Id: I0c729ea1590a8759b3985cfd0d81ecd57a795a85
Signed-off-by: Prudhvi Yarlagadda <pyarlaga@codeaurora.org>