Vega 56 crash when using OpenCL
When mining with XMRig 6.21.3 on Vega56, the GPU crashes after about 10 seconds.

Start xmrig with the following config: 

```
    "opencl": {
        "enabled": true,
        "cache": true,
        "loader": null,
        "platform": "AMD",
        "adl": true,
        "cn": [
            {
                "index": 0,
                "intensity": 896,
                "worksize": 8,
                "strided_index": [1, 2],
                "threads": [-1, -1],
                "unroll": 8
            }
        ],
        "cn-heavy": [
            {
                "index": 0,
                "intensity": 896,
                "worksize": 8,
                "strided_index": [1, 2],
                "threads": [-1, -1],
                "unroll": 8
            }
        ],
        "cn-lite": [
            {
                "index": 0,
                "intensity": 1792,
                "worksize": 8,
                "strided_index": [1, 2],
                "threads": [-1, -1],
                "unroll": 8
            }
        ],
        "cn-pico": [
            {
                "index": 0,
                "intensity": 1792,
                "worksize": 8,
                "strided_index": [2, 2],
                "threads": [-1, -1],
                "unroll": 8
            }
        ],
        "cn/2": [
            {
                "index": 0,
                "intensity": 896,
                "worksize": 8,
                "strided_index": [2, 2],
                "threads": [-1, -1],
                "unroll": 8
            }
        ],
        "cn/upx2": [
            {
                "index": 0,
                "intensity": 1792,
                "worksize": 8,
                "strided_index": [2, 2],
                "threads": [-1, -1],
                "unroll": 8
            }
        ],
        "kawpow": [
            {
                "index": 0,
                "intensity": 14680064,
                "worksize": 256,
                "threads": [-1],
                "unroll": 1
            }
        ],
        "rx": [
            {
                "index": 0,
                "intensity": 896,
                "worksize": 8,
                "threads": [-1, -1],
                "bfactor": 6,
                "gcn_asm": false,
                "dataset_host": false
            }
        ],
        "cn-lite/0": false,
        "cn/0": false
    }
```


 
Arch Linux, ROCm Core 6.0.2, AMDGPU 23.40

