msm: clock-8960: Lower frequency requirements of fpb active votes

We have an active set vote for the multimedia fpb and chip fpb so
that the registers are accessible whenever the processor is
awake. Unfortunately these requests are at the highest rate
supported which is not really necessary to ensure that the buses
are clocking. Lower the rate requests to the fastest speed that
doesn't require increasing voltages to allow the chip to hit low
voltages when the processor is awake.

Change-Id: I8ed285420b86833f5403fec364c8d8e39f4b0311
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>