clk: msm: clock-osm: Set Nominal Fmax frequency for boot

Request the Nominal Fmax as the boot frequency for
each cluster during probe. This is done to ensure reasonable
boot time.

CRs-Fixed: 994035
Change-Id: Ic2dac9bdc1cd9f9b8d236997eba2e63295d6b4c0
Signed-off-by: Osvaldo Banuelos <osvaldob@codeaurora.org>