riscv: configs: defconfig: Enable Renesas RZ/Five SoC

Enable Renesas RZ/Five SoC config in defconfig. It allows the default
upstream kernel to boot on RZ/Five SMARC EVK board.

Alongside enable SERIAL_SH_SCI config so that the serial driver used by
RZ/Five SoC is built-in.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Link: https://lore.kernel.org/r/20221028165921.94487-8-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/riscv/configs/defconfig

@@ -26,6 +26,7 @@ CONFIG_EXPERT=y
 # CONFIG_SYSFS_SYSCALL is not set
 CONFIG_PROFILING=y
 CONFIG_SOC_MICROCHIP_POLARFIRE=y
+CONFIG_ARCH_RENESAS=y
 CONFIG_SOC_SIFIVE=y
 CONFIG_SOC_STARFIVE=y
 CONFIG_SOC_VIRT=y
@@ -123,6 +124,7 @@ CONFIG_INPUT_MOUSEDEV=y
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_OF_PLATFORM=y
+CONFIG_SERIAL_SH_SCI=y
 CONFIG_VIRTIO_CONSOLE=y
 CONFIG_HW_RANDOM=y
 CONFIG_HW_RANDOM_VIRTIO=y
@@ -159,6 +161,7 @@ CONFIG_VIRTIO_MMIO=y
 CONFIG_RPMSG_CHAR=y
 CONFIG_RPMSG_CTRL=y
 CONFIG_RPMSG_VIRTIO=y
+CONFIG_ARCH_R9A07G043=y
 CONFIG_EXT4_FS=y
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_EXT4_FS_SECURITY=y