Revert "drm/amdgpu/vcn3.0: remove extra asic type check"

This reverts commit 058c07201ec7d373fc6a0a570b38a8a9d62c29fb.
Chip NAVY_FLOUNDER uses vcn3.0, but it has only one VCN instance.
Signed-off-by: James Zhu <James.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c

@@ -88,6 +88,7 @@ static int vcn_v3_0_early_init(void *handle)
 		adev->vcn.num_enc_rings = 1;
 
 	} else {
+		if (adev->asic_type == CHIP_SIENNA_CICHLID) {
 			u32 harvest;
 			int i;
 
@@ -102,6 +103,8 @@ static int vcn_v3_0_early_init(void *handle)
 						AMDGPU_VCN_HARVEST_VCN1))
 				/* both instances are harvested, disable the block */
 				return -ENOENT;
+		} else
+			adev->vcn.num_vcn_inst = 1;
 
 		adev->vcn.num_enc_rings = 2;
 	}