spl: Avoid checking for Ctrl-C in SPL with print_buffer()

We don't have a console in SPL so it doesn't make sense to check for
Ctrl-C when printing a memory dump. Skip this so that print_buffer() can
be used in SPL.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

lib/display_options.c

@@ -205,8 +205,10 @@ int print_buffer(ulong addr, const void *data, uint width, uint count,
 		addr += thislinelen * width;
 		count -= thislinelen;
 
+#ifndef CONFIG_SPL_BUILD
 		if (ctrlc())
 			return -1;
+#endif
 	}
 
 	return 0;