drm/amdgpu/psp12: move ih_reroute into ring_create

This matches what we do for psp 3.1 and makes ring_init
common for all PSP versions.
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/psp_v12_0.c

@@ -243,8 +243,6 @@ static int psp_v12_0_ring_init(struct psp_context *psp,
 	struct psp_ring *ring;
 	struct amdgpu_device *adev = psp->adev;
 
-	psp_v12_0_reroute_ih(psp);
-
 	ring = &psp->km_ring;
 
 	ring->ring_type = ring_type;
@@ -272,6 +270,8 @@ static int psp_v12_0_ring_create(struct psp_context *psp,
 	struct psp_ring *ring = &psp->km_ring;
 	struct amdgpu_device *adev = psp->adev;
 
+	psp_v12_0_reroute_ih(psp);
+
 	if (amdgpu_sriov_vf(psp->adev)) {
 		/* Write low address of the ring to C2PMSG_102 */
 		psp_ring_reg = lower_32_bits(ring->ring_mem_mc_addr);