[BUG] [BISECT] rockchip: roc-pc-rk3399: TPL misses dtb

[Markus Reichl]

With recent U-Boot and roc-pc-mezzanine-rk3399_defconfig
and booting from SPI flash I get:

U-Boot TPL 2021.01-00884-g0a2aaab0b6 (Feb 15 2021 - 14:36:50)
Missing DTB
### ERROR ### Please RESET the board ###

Bisecting points to:

commit 0a2aaab0b678fd1778ff2fc59d0770fc82995532
Author: Simon Glass <sjg at chromium.org>
Date:   Wed Jan 13 20:29:49 2021 -0700

     fdtdec: Use CONFIG_IS_ENABLED in board_fdt_blob_setup()
     
     This setting may be different in SPL and TPL. Update the code to check
     the correct setting.
     
     Signed-off-by: Simon Glass <sjg at chromium.org>

  lib/fdtdec.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

Reverting this commit fixes booting.