sandbox: Enable console recording and silent console

Allow console recording so that tests can use it. Also allow the console
output to be suppressed, to reduce test output 'noise'.

Signed-off-by: Simon Glass <sjg@chromium.org>

configs/sandbox_defconfig

+CONFIG_SYS_MALLOC_F_LEN=0x2000
 CONFIG_PCI=y
 CONFIG_DEFAULT_DEVICE_TREE="sandbox"
 CONFIG_FIT=y
@@ -16,6 +17,8 @@ CONFIG_CMD_PMIC=y
 CONFIG_CMD_REGULATOR=y
 CONFIG_CMD_TPM=y
 CONFIG_CMD_TPM_TEST=y
+CONFIG_CONSOLE_RECORD=y
+CONFIG_CONSOLE_RECORD_OUT_SIZE=0x1000
 CONFIG_OF_CONTROL=y
 CONFIG_OF_HOSTFILE=y
 CONFIG_REGMAP=y

include/configs/sandbox.h

@@ -65,6 +65,7 @@
 #define CONFIG_SYS_HUSH_PARSER
 #define CONFIG_SYS_LONGHELP			/* #undef to save memory */
 #define CONFIG_SYS_CBSIZE		1024	/* Console I/O Buffer Size */
+#define CONFIG_SILENT_CONSOLE
 
 /* Print Buffer Size */
 #define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + sizeof(CONFIG_SYS_PROMPT) + 16)