update perf-uncore-events-skx.csv to SKX uncore JSON file v1.28
update perf-uncore-events-skx.csv to SKX uncore JSON file v1.28

Signed-off-by: Zhengjun Xing <e93ad64aa28e0f5b0e0d92d320a7d0f379095717@linux.intel.com>

intel/event-converter-for-linux-perf,intel/event-converter-for-linux-perf