Function PD_Free

paddle/phi/common/cpstring_impl.h:186–188

* Need to implement in other source file. */

 * Need to implement in other source file.
 */
HOSTDEVICE static inline void PD_Free(void *ptr, size_t size UNUSED) {
  free(ptr);
}

HOSTDEVICE static inline void *PD_Memset(void *src, int ch, size_t size) {
  char *dst = (char *)src;  // NOLINT