PCI: j721e: Drop redundant struct device *

PCI: j721e: Drop redundant struct device *

The struct cdns_pcie already contains the struct device for the j721e PCIe
controller.  There's no need to store another copy in struct j721e_pcie.
Remove the redundant copy from struct j721e_pcie.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Bjorn Helgaas <[email protected]>
Cc: Kishon Vijay Abraham I <[email protected]>
Cc: Tom Joseph <[email protected]>