Remove an impossible check

amdsmi/tests/amd_smi_test/functional/memorypartition_read_write.cc:453:32: warning: the address of ‘orig_memory_partition’ will never be NULL [-Waddress]
  453 |     if ((orig_memory_partition == nullptr) ||
      |          ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~

Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>

tests/amd_smi_test/functional/memorypartition_read_write.cc

@@ -458,8 +458,7 @@ void TestMemoryPartitionReadWrite::Run(void) {
                 << orig_memory_partition << std::endl;
     }
 
-    if ((orig_memory_partition == nullptr) ||
-       (orig_memory_partition[0] == '\0')) {
+    if (orig_memory_partition[0] == '\0') {
       std::cout << "***System memory partition value is not defined or received"
                   " unexpected data. Skip memory partition test." << std::endl;
       continue;