Revert "sandbox: Drop special case console code for sandbox"

While sandbox works OK without the special-case code, it does result in
console output being stored in the pre-console buffer while sandbox starts
up. If there is a crash or a problem then there is no indication of what
is going on.

For ease of debugging it seems better to revert this change also.

This reverts commit d8c6fb8c.

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

common/console.c

@@ -489,6 +489,13 @@ static inline void print_pre_console_buffer(int flushpoint) {}
 
 void putc(const char c)
 {
+#ifdef CONFIG_SANDBOX
+	/* sandbox can send characters to stdout before it has a console */
+	if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
+		os_putc(c);
+		return;
+	}
+#endif
 #ifdef CONFIG_DEBUG_UART
 	/* if we don't have a console yet, use the debug UART */
 	if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {