[U-Boot] [PATCH] dm: README: recommend u-boot.dtb to try driver-model on sandbox

[Masahiro Yamada]

To enjoy driver-model on sandbox, using device tree is recommended.
While we are here, change sandbox_config to sandbox_defconfig too.

Signed-off-by: Masahiro Yamada <yamada.m at jp.panasonic.com>
---

 doc/driver-model/README.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/doc/driver-model/README.txt b/doc/driver-model/README.txt
index 3e2f622..eafa825 100644
--- a/doc/driver-model/README.txt
+++ b/doc/driver-model/README.txt
@@ -36,9 +36,9 @@ How to try it
 
 Build U-Boot sandbox and run it:
 
-   make sandbox_config
+   make sandbox_defconfig
    make
-   ./u-boot
+   ./u-boot -d u-boot.dtb
 
    (type 'reset' to exit U-Boot)
 
-- 
1.9.1