drm/amdgpu: handle enforce isolation on non-0 gfxhub

Some chips have more than one gfxhub so check if we
are a gfxhub rather than just gfxhub 0.
Acked-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c

@@ -484,7 +484,7 @@ int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
 bool amdgpu_vmid_uses_reserved(struct amdgpu_vm *vm, unsigned int vmhub)
 {
 	return vm->reserved_vmid[vmhub] ||
-		(enforce_isolation && (vmhub == AMDGPU_GFXHUB(0)));
+		(enforce_isolation && AMDGPU_IS_GFXHUB(vmhub));
 }
 
 int amdgpu_vmid_alloc_reserved(struct amdgpu_device *adev,