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[Why] VM_helper needs to be intialized with the dc struct in order to fix an unallocated memory issue. System aperture settings should be initialized to 0 and guarded with a check to make sure vm_config is valid. [How] Allocate and free memory for vm_helper with other dc members. Check whether the vm_config valid bit is set before initializing aperture settings. Signed-off-by: Eryk Brol <eryk.brol@amd.com> Reviewed-by: Jun Lei <Jun.Lei@amd.com> Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>