arm64: defconfig: Enable R-Car PCIe endpoint driver

Enable R-Car PCIe endpoint driver on RZ/G2E board, including enabling
endpoint configurations CONFIG_PCI_ENDPOINT, CONFIG_PCI_ENDPOINT_CONFIGFS,
CONFIG_PCI_EPF_TEST and CONFIG_PCI_ENDPOINT_TEST required to use and test
the driver.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20200811140357.564-1-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/configs/defconfig

@@ -208,6 +208,7 @@ CONFIG_HOTPLUG_PCI_ACPI=y
 CONFIG_PCI_AARDVARK=y
 CONFIG_PCI_TEGRA=y
 CONFIG_PCIE_RCAR_HOST=y
+CONFIG_PCIE_RCAR_EP=y
 CONFIG_PCI_HOST_GENERIC=y
 CONFIG_PCI_XGENE=y
 CONFIG_PCIE_ALTERA=y
@@ -224,6 +225,9 @@ CONFIG_PCIE_ARMADA_8K=y
 CONFIG_PCIE_KIRIN=y
 CONFIG_PCIE_HISI_STB=y
 CONFIG_PCIE_TEGRA194_HOST=m
+CONFIG_PCI_ENDPOINT=y
+CONFIG_PCI_ENDPOINT_CONFIGFS=y
+CONFIG_PCI_EPF_TEST=m
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_FW_LOADER_USER_HELPER=y
@@ -254,6 +258,7 @@ CONFIG_BLK_DEV_NBD=m
 CONFIG_VIRTIO_BLK=y
 CONFIG_BLK_DEV_NVME=m
 CONFIG_SRAM=y
+CONFIG_PCI_ENDPOINT_TEST=m
 CONFIG_EEPROM_AT24=m
 CONFIG_EEPROM_AT25=m
 CONFIG_UACCE=m