rockchip: rk3588s-orangepi-5: Build SPI image

Enable building of the SPI image, u-boot-rockchip-spi.bin, now that we
know what bootsource id values BootRom use for SPI flash on RK3588.

Fixes: 28c5f941edf7 ("board: rockchip: Add Xunlong Orange Pi 5")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/configs/orangepi-5-rk3588s_defconfig b/configs/orangepi-5-rk3588s_defconfig
index 3ff89c6..a9404c9 100644
--- a/configs/orangepi-5-rk3588s_defconfig
+++ b/configs/orangepi-5-rk3588s_defconfig
@@ -13,6 +13,7 @@
 CONFIG_DEFAULT_DEVICE_TREE="rk3588s-orangepi-5"
 CONFIG_ROCKCHIP_RK3588=y
 CONFIG_SPL_ROCKCHIP_COMMON_BOARD=y
+CONFIG_ROCKCHIP_SPI_IMAGE=y
 CONFIG_SPL_SERIAL=y
 CONFIG_SPL_STACK_R_ADDR=0x600000
 CONFIG_TARGET_EVB_RK3588=y