Fix square.cu to use cudaError_t instead of hipError_t

Change-Id: If3314910d1c03122741d3e0a45e14a4412c473b3

hipamd/samples/0_Intro/square/square.cu

@@ -24,7 +24,7 @@ THE SOFTWARE.
 
 #define CHECK(cmd) \
 {\
-    hipError_t error  = cmd;\
+    cudaError_t error  = cmd;\
     if (error != cudaSuccess) { \
       fprintf(stderr, "error: '%s'(%d) at %s:%d\n", cudaGetErrorString(error), error,__FILE__, __LINE__); \
     exit(EXIT_FAILURE);\