[ROCm] Enable fp_quantizer on ROCm (#7027)

This change is required to successfully build fp_quantizer extension on
ROCm.

---------

Co-authored-by: Logan Adams <114770087+loadams@users.noreply.github.com>

Author: rraminen

op_builder/fp_quantizer.py

@@ -94,7 +94,10 @@ def sources(self):
         ]
 
     def extra_ldflags(self):
-        return ['-lcurand']
+        if not self.is_rocm_pytorch():
+            return ['-lcurand']
+        else:
+            return []
 
     def include_paths(self):
         return ['csrc/fp_quantizer/includes', 'csrc/includes']