SWDEV-339113 - Update sampl codes with correct kernel coordinate (#2704)

Change-Id: Ibfc0fd285441cd3d79b312d2b739729a039a6f84

samples/0_Intro/square/square.hipref.cpp

@@ -38,8 +38,8 @@ THE SOFTWARE.
  */
 template <typename T>
 __global__ void vector_square(T* C_d, const T* A_d, size_t N) {
-    size_t offset = (hipBlockIdx_x * hipBlockDim_x + hipThreadIdx_x);
-    size_t stride = hipBlockDim_x * hipGridDim_x;
+    size_t offset = (blockIdx.x * blockDim_x + threadIdx.x);
+    size_t stride = blockDim.x * gridDim.x;
 
     for (size_t i = offset; i < N; i += stride) {
         C_d[i] = A_d[i] * A_d[i];