msm: kgsl: Add support to disable CP Crash Dumper

By default A5xx GPUs use CP crash dumper to get GPU
snapshot in case of any fault.

At times it is required to disable crash dumper
in case of any abnormalities, add support to do so.

Change-Id: Iea6497778bcd711e769f0e509103bd3bd0fd8574
Signed-off-by: Rajesh Kemisetti <rajeshk@codeaurora.org>