IPP: cv::ipp::getIppTopFeatures() return value on 32-bit configurations

Windows 32-bit:

```
Intel(R) IPP version: ippIP SSE4.2 (p8) 2019.0.0 Gold (-) Jul 26 2018
```

`cv::ipp::getIppTopFeatures()` returns `0x8000` (`ippCPUID_AVX2`).
It should be `0x80` (`ippCPUID_SSE42`) because SSE4.2 backend is used.

relates #12877