SWDEV-339113 - update coordinate in HIP sample kernels (#2736)

Change-Id: I8ea179b4ba8f1c0ebec830a5aa5947e843f06e42

samples/2_Cookbook/5_2dshfl/Readme.md

@@ -31,7 +31,7 @@ We will be using the Simple Matrix Transpose application from the previous tutor
 
 In the same sourcecode, we used for MatrixTranspose. We'll add the following:
 ```
-	int y = hipBlockDim_y * hipBlockIdx_y + hipThreadIdx_y;
+	int y = blockDim.y * blockIdx.y + threadIdx.y;
 	out[x*width + y] = __shfl(val,y*width + x);
 ```