PCI: Add TI J721E device to PCI IDs

Add TI J721E device to the PCI ID database. Since this device has a
configurable PCIe endpoint, it could be used with different drivers.

Link: https://lore.kernel.org/r/20210201195809.7342-15-kishon@ti.com


Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>