Code style clean-up and documentation

The following changes were made:
- Clean-up of variable namings
- Addition of README
- Removal of num_cu and occupancy args; such options are meant for
  testing purposes and should not be exposed to the user
- Removal of CK_TILE_PIPELINE_MEMORY macro and PipelineTypeTraits class
  since we only support one pipeline at the moment.

example/ck_tile/40_streamk_gemm/README.md

@@ -0,0 +1,37 @@
+# Stream-K GEMM
+
+This folder contains examples of Stream-K GEMMs using the ck_tile tile-programming implementation.
+
+## build
+```
+# in the root of ck_tile
+mkdir build && cd build
+# you can replace <arch> with the appropriate architecture (for example gfx942) or leave it blank
+../script/cmake-ck-dev.sh  ../ <arch>
+# Compile the Stream-K kernels
+make tile_example_streamk_gemm_basic -j
+```
+This will result in an executable `build/bin/tile_example_streamk_gemm_basic`
+
+## example
+```
+args:
+                 -m    m dimension (default:512)
+                 -n    n dimension (default:512)
+                 -k    k dimension (default:512)
+          -a_layout    tensor A data layout (default: R)
+          -b_layout    tensor B data layout (default: C)
+          -c_layout    tensor C data layout (default: R)
+     -num_sk_blocks    number of Stream-K blocks. -1: chosen by algorithm, or user selected (default:-1)
+-reduction_strategy    strategy for storing results in C tensor. atomic/reduction (default:atomic)
+          -stride_a    tensor A stride (default:0)
+          -stride_b    tensor B stride (default:0)
+          -stride_c    tensor C stride (default:0)
+                 -v    validation strategy. 0. No validation, 1. Validation on CPU, 2. Validation on GPU (default:1)
+              -prec    data type. fp16/bf16 (default:fp16)
+            -warmup    number of iterations before benchmarking the kernel (default:50)
+            -repeat    number of iterations to benchmark the kernel (default:100)
+             -timer    timing mode. gpu:gpu timer, cpu:cpu timer (default:gpu)
+              -init    data initialization strategy. 0:random, 1:linear, 2:constant(1) (default:0)
+       -flush_cache    flush the cache before running the kernel (default:true)
+```