[SUNSU]: Fix missing spinlock initialization.

Caught by CONFIG_DEBUG_SPINLOCK.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/serial/sunsu.c b/drivers/serial/sunsu.c
index 46510e7..46c44b8 100644
--- a/drivers/serial/sunsu.c
+++ b/drivers/serial/sunsu.c
@@ -1280,6 +1280,7 @@
 	struct serio *serio;
 #endif
 
+	spin_lock_init(&up->port.lock);
 	up->port.line = channel;
 	up->port.type = PORT_UNKNOWN;
 	up->port.uartclk = (SU_BASE_BAUD * 16);
@@ -1509,6 +1510,7 @@
 		    up->su_type == SU_PORT_KBD)
 			continue;
 
+		spin_lock_init(&up->port.lock);
 		up->port.flags |= UPF_BOOT_AUTOCONF;
 		up->port.type = PORT_UNKNOWN;
 		up->port.uartclk = (SU_BASE_BAUD * 16);