msm: camera: cpas: Fix parsing of static bw values for ICC

The static values for AHB bw do not exceed u32, and using u64
parsing function to read it requires unnecessary device tree
changes. Changing parsing function for bw values from 64-bit
to 32-bit version.

CRs-Fixed: 2584631
Change-Id: Ie7c685fd40a0ee390f997fbe6cf3610c2209e3f1
Signed-off-by: Mukund Madhusudan Atre <matre@codeaurora.org>