misc: Run pre-commit run --all-files

This is reflect the updates made to black when running `pre-commit
autoupdate`.

Change-Id: Ifb7fea117f354c7f02f26926a5afdf7d67bc5919

src/mem/NVMInterface.py

@@ -39,6 +39,7 @@ from m5.objects.MemCtrl import MemCtrl
 from m5.objects.MemInterface import MemInterface
 from m5.objects.DRAMInterface import AddrMap
 
+
 # The following interface aims to model byte-addressable NVM
 # The most important system-level performance effects of a NVM
 # are modeled without getting into too much detail of the media itself.