Documentation: PCI: pci.rst: drop doubled words

Drop the doubled word "when".
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org
Link: https://lore.kernel.org/r/20200703212156.30453-5-rdunlap@infradead.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/PCI/pci.rst

@@ -209,7 +209,7 @@ the PCI device by calling pci_enable_device(). This will:
    OS BUG: we don't check resource allocations before enabling those
    resources. The sequence would make more sense if we called
    pci_request_resources() before calling pci_enable_device().
-   Currently, the device drivers can't detect the bug when when two
+   Currently, the device drivers can't detect the bug when two
    devices have been allocated the same range. This is not a common
    problem and unlikely to get fixed soon.