drm/amdkfd: Module option to disable CRAT table

Some systems have broken CRAT tables. Add a module option to ignore
a CRAT table.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>