rockchip: rk3399: move boot_devices into soc file

Move boot_devices definition into rk3399.c, so that we can
share the common code for board_spl_was_booted_from().

Signed-off-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 c4337e6..89c4d59 100644
--- a/arch/arm/mach-rockchip/rk3399/rk3399.c
+++ b/arch/arm/mach-rockchip/rk3399/rk3399.c
@@ -9,6 +9,7 @@
 #include <syscon.h>
 #include <asm/armv8/mmu.h>
 #include <asm/io.h>
+#include <asm/arch-rockchip/bootrom.h>
 #include <asm/arch-rockchip/clock.h>
 #include <asm/arch-rockchip/gpio.h>
 #include <asm/arch-rockchip/grf_rk3399.h>
@@ -20,6 +21,12 @@
 #define GRF_EMMCCORE_CON11 0xff77f02c
 #define GRF_BASE	0xff770000
 
+const char * const boot_devices[BROM_LAST_BOOTSOURCE + 1] = {
+	[BROM_BOOTSOURCE_EMMC] = "/sdhci@fe330000",
+	[BROM_BOOTSOURCE_SPINOR] = "/spi@ff1d0000",
+	[BROM_BOOTSOURCE_SD] = "/dwmmc@fe320000",
+};
+
 static struct mm_region rk3399_mem_map[] = {
 	{
 		.virt = 0x0UL,