drm/amdgpu: skip ih2 rb allocation for IH 4.4.2

No ih2 hardware on IH 4.4.2.
Signed-off-by: Le Ma <le.ma@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/vega20_ih.c

@@ -552,12 +552,14 @@ static int vega20_ih_sw_init(void *handle)
 	adev->irq.ih1.use_doorbell = true;
 	adev->irq.ih1.doorbell_index = (adev->doorbell_index.ih + 1) << 1;
 
-	r = amdgpu_ih_ring_init(adev, &adev->irq.ih2, PAGE_SIZE, true);
-	if (r)
-		return r;
+	if (adev->ip_versions[OSSSYS_HWIP][0] != IP_VERSION(4, 4, 2)) {
+		r = amdgpu_ih_ring_init(adev, &adev->irq.ih2, PAGE_SIZE, true);
+		if (r)
+			return r;
 
-	adev->irq.ih2.use_doorbell = true;
-	adev->irq.ih2.doorbell_index = (adev->doorbell_index.ih + 2) << 1;
+		adev->irq.ih2.use_doorbell = true;
+		adev->irq.ih2.doorbell_index = (adev->doorbell_index.ih + 2) << 1;
+	}
 
 	/* initialize ih control registers offset */
 	vega20_ih_init_register_offset(adev);