Modify the set component of the memcpy test (unclear why there is a memset component to begin with).

[ROCm/hip commit: 4131b47134]

projects/hip/tests/src/deviceLib/hipDeviceMemcpy.cpp

@@ -23,7 +23,7 @@ __global__ void cpy(hipLaunchParm lp, uint32_t *Out, uint32_t *In)
 __global__ void set(hipLaunchParm lp, uint32_t *ptr, uint8_t val, size_t size)
 {
     int tx = threadIdx.x;
-    memset(ptr + tx, val, (sizeof(uint32_t)*(size/LEN)));
+    memset(ptr + tx, val, sizeof(uint32_t));
 }
 
 int main()