misc: pci_endpoint_test: Add Device ID for R-Car S4-8 PCIe controller

Add Renesas R8A779F0 in pci_device_id table so that pci-epf-test
can be used for testing PCIe EP on R-Car S4-8.

Link: https://lore.kernel.org/linux-pci/20231018085631.1121289-16-yoshihiro.shimoda.uh@renesas.com


Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Acked-by: Manivannan Sadhasivam <mani@kernel.org>