Enable GPU direct RDMA read from GPU

src/graph/paths.cc

@@ -316,9 +316,6 @@ ncclResult_t ncclTopoCheckGdr(struct ncclTopoSystem* system, int64_t busId, int
   if (read) { // For reads (sends) only enable under certain conditions
     int gdrReadParam = ncclParamNetGdrRead();
     if (gdrReadParam == 0) return ncclSuccess;
-#if defined(__HIP_PLATFORM_HCC__) || defined(__HCC__) || defined(__HIPCC__)
-    return ncclSuccess;
-#else
     if (gdrReadParam < 0) {
       int nvlink = 0;
       // Since we don't know whether there are other communicators,
@@ -333,7 +330,6 @@ ncclResult_t ncclTopoCheckGdr(struct ncclTopoSystem* system, int64_t busId, int
       }
       if (!nvlink) return ncclSuccess;
     }
-#endif
   }
 
   // Check if we are close enough that it makes sense to enable GDR