msm: camera: cpas: Removing getting clk rate in cpas dump

cpas dump may be called from tasklets where sleep is
not allowed. Remove calling clk get rate APIs which
will internally have mutexes which can sleep.

CRs-Fixed: 2797701
Change-Id: Ia46238c26e4f39978f58643716a43fbdb60e8ae6
Signed-off-by: Pavan Kumar Chilamkurthi <pchilamk@codeaurora.org>