pcie-designware.c sparse warning

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Subject: pcie-designware.c sparse warning
From: Bjorn Helgaas <helgaas@xxxxxxxxxx>
Date: Tue, 8 Sep 2020 14:53:43 -0500
Cc: linux-pci@xxxxxxxxxxxxxxx

FYI, got the following warning from "make C=2 drivers/pci/":

  CHECK   drivers/pci/controller/dwc/pcie-designware.c
drivers/pci/controller/dwc/pcie-designware.c:432:52: warning: cast truncates bits from constant value (ffffffff7fffffff becomes 7fffffff)

This is on my "next" branch.

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