rockchip: Move to standard boot

Drop the distro-boot scripts and use standard boot instead.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Jonas Karlman <jonas@kwiboo.se>
diff --git a/include/configs/rk3288_common.h b/include/configs/rk3288_common.h
index 71d2426..3063076 100644
--- a/include/configs/rk3288_common.h
+++ b/include/configs/rk3288_common.h
@@ -23,8 +23,6 @@
 	"kernel_addr_r=0x02000000\0" \
 	"ramdisk_addr_r=0x04000000\0"
 
-#include <config_distro_bootcmd.h>
-
 /* Linux fails to load the fdt if it's loaded above 256M on a Rock 2 board, so
  * limit the fdt reallocation to that */
 #define CFG_EXTRA_ENV_SETTINGS \
@@ -34,6 +32,6 @@
 	"partitions=" PARTS_DEFAULT \
 	ENV_MEM_LAYOUT_SETTINGS \
 	ROCKCHIP_DEVICE_SETTINGS \
-	BOOTENV
+	"boot_targets=" BOOT_TARGETS "\0"
 
 #endif