console-server: introduce `struct console_server`

Lift `struct console_server` from `struct console`

struct console_server will enable obmc-console to support multiple
consoles in a single obmc-console-server in the future.

Currently the 'struct console_server' only supports one active console.

Change-Id: Icb22fb46f217b174f3bccc0a03485549d82d1d6b
Signed-off-by: Alexander Hansen <alexander.hansen@9elements.com>
diff --git a/console-dbus.c b/console-dbus.c
index d9b8689..220d3e0 100644
--- a/console-dbus.c
+++ b/console-dbus.c
@@ -37,7 +37,7 @@
 	int i;
 	int rc;
 
-	tty_init_termios(console);
+	tty_init_termios(console->server);
 
 	for (i = 0; i < console->n_handlers; i++) {
 		const struct handler_type *type;
@@ -49,7 +49,7 @@
 			continue;
 		}
 
-		rc = type->baudrate(handler, console->tty.uart.baud);
+		rc = type->baudrate(handler, console->server->tty.uart.baud);
 		if (rc) {
 			warnx("Can't set terminal baudrate for handler %s",
 			      type->name);
@@ -82,8 +82,8 @@
 		return -EINVAL;
 	}
 
-	assert(console->tty.type == TTY_DEVICE_UART);
-	console->tty.uart.baud = speed;
+	assert(console->server->tty.type == TTY_DEVICE_UART);
+	console->server->tty.uart.baud = speed;
 	tty_change_baudrate(console);
 
 	sd_bus_emit_properties_changed(bus, path, interface, property, NULL);
@@ -99,13 +99,14 @@
 			    sd_bus_error *error __attribute__((unused)))
 {
 	struct console *console = userdata;
+	struct console_server *server = console->server;
 	uint64_t baudrate;
 	int r;
 
-	assert(console->tty.type == TTY_DEVICE_UART);
-	baudrate = parse_baud_to_int(console->tty.uart.baud);
+	assert(server->tty.type == TTY_DEVICE_UART);
+	baudrate = parse_baud_to_int(server->tty.uart.baud);
 	if (!baudrate) {
-		warnx("Invalid baud rate: '%d'", console->tty.uart.baud);
+		warnx("Invalid baud rate: '%d'", server->tty.uart.baud);
 	}
 
 	r = sd_bus_message_append(reply, "t", baudrate);
@@ -190,7 +191,7 @@
 		return -1;
 	}
 
-	if (console->tty.type == TTY_DEVICE_UART) {
+	if (console->server->tty.type == TTY_DEVICE_UART) {
 		/* Register UART interface */
 		r = sd_bus_add_object_vtable(console->bus, NULL, obj_name,
 					     UART_INTF, console_uart_vtable,