rockchip: rk3399: sync spl_boot_devices_tbl and boot_devices node paths

While technically not a bug, let's have some consistency in paths
returned by u-boot,spl-boot-order look-up and the one saved in
u-boot,spl-boot-device by syncing spl_boot_devices_tbl and boot_devices
node paths.

Cc: Quentin Schulz <foss+uboot@0leil.net>
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Tested-by: Xavier Drudis Ferran <xdrudis@tinet.cat>
Reviewed-by: Xavier Drudis Ferran <xdrudis@tinet.cat>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/mach-rockchip/rk3399/rk3399.c b/arch/arm/mach-rockchip/rk3399/rk3399.c
index 819cc7f..21db03b 100644
--- a/arch/arm/mach-rockchip/rk3399/rk3399.c
+++ b/arch/arm/mach-rockchip/rk3399/rk3399.c
@@ -182,7 +182,7 @@
 	} spl_boot_devices_tbl[] = {
 		{ BOOT_DEVICE_MMC2, "/mmc@fe320000" },
 		{ BOOT_DEVICE_MMC1, "/mmc@fe330000" },
-		{ BOOT_DEVICE_SPI, "/spi@ff1d0000" },
+		{ BOOT_DEVICE_SPI, "/spi@ff1d0000/flash@0" },
 	};
 
 	for (i = 0; i < ARRAY_SIZE(spl_boot_devices_tbl); ++i)