msm: kgsl: Use the crash dumper to read HLSQ/shader memory on 5XX

The host AHB aperture for reading the HSLQ/SP/TP and shader memory
blocks might be blocked on A5XX targets so use the CP crash dump
utility to read them instead.  Downside if the crashdumper goes boom
we'll have to skip those registers in the fallback.

Change-Id: Ic0dedbad3c7b485c696198bdfcb78d45e929ec22
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>