misc: pci_endpoint_test: Add Device ID for RZ/G2M and RZ/G2N PCIe controllers

misc: pci_endpoint_test: Add Device ID for RZ/G2M and RZ/G2N PCIe controllers

Add Renesas R8A774A1 and R8A774B1 in pci_device_id table so that
pci-epf-test can be used for testing PCIe EP on RZ/G2M and RZ/G2N.

Link: https://lore.kernel.org/r/20200814173037.17822-3-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>