T-API: optimization of cv::minMaxLoc, cv::norm (NORM_INF), cv::normalize (CV_MINMAX, CV_C) - used min/max

**Description:**
* used `min (fmin) / max (fmax)` functions in case when we don't need `minloc / maxloc`

**Performance report:**
http://ocl.itseez.com/intel/export/perf/pr/2936/report/

check_regression=*OCL*Norm*:*OCL*MinMaxLoc*
test_modules=core
test_filter=*OCL*Norm*:*OCL*MinMaxLoc*
build_examples=OFF