log: sandbox: Enable logging

Enable all logging features on sandbox so that the tests can be run.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index b8d1e8c..7efb4eb 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -16,6 +16,8 @@
 CONFIG_SILENT_CONSOLE=y
 CONFIG_PRE_CONSOLE_BUFFER=y
 CONFIG_PRE_CON_BUF_ADDR=0x100000
+CONFIG_LOG=y
+CONFIG_LOG_MAX_LEVEL=6
 CONFIG_CMD_CPU=y
 CONFIG_CMD_LICENSE=y
 CONFIG_CMD_BOOTZ=y
@@ -64,6 +66,7 @@
 CONFIG_CMD_CRAMFS=y
 CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_MTDPARTS=y
+CONFIG_CMD_LOG=y
 CONFIG_MAC_PARTITION=y
 CONFIG_AMIGA_PARTITION=y
 CONFIG_OF_CONTROL=y