Speedup the code

Speedup the code

AliTPCclusterKr.h
- Removed unneccessary Compress function

AliTPCclustererKr.cxx  AliTPCclustererKr.h
- Divide function FindClusterIO to two function
   - MakeCluster added
- GetThe size of array before loop
- Use uncheckedAt inside loop we konw the range
- Split and condition - Abs and Class Function called only once
- Use integer precission for local variables - (vtune warnings)