s390/3270: make raw3270_state_final() depend on CONFIG_TN3270_CONSOLE

If CONFIG_TN3270_CONSOLE is not enabled clang emits the following warning:

drivers/s390/char/raw3270.c:114:19:
  error: unused function 'raw3270_state_final' [-Werror,-Wunused-function]
static inline int raw3270_state_final(struct raw3270 *rp)

Get rid of this warning by making raw3270_state_final() only
available if CONFIG_TN3270_CONSOLE is enabled.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>

drivers/s390/char/raw3270.c

@@ -111,12 +111,6 @@ static inline int raw3270_state_ready(struct raw3270 *rp)
 	return rp->state == RAW3270_STATE_READY;
 }
 
-static inline int raw3270_state_final(struct raw3270 *rp)
-{
-	return rp->state == RAW3270_STATE_INIT ||
-		rp->state == RAW3270_STATE_READY;
-}
-
 void
 raw3270_buffer_address(struct raw3270 *rp, char *cp, unsigned short addr)
 {
@@ -749,6 +743,12 @@ raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc)
 /* Tentative definition - see below for actual definition. */
 static struct ccw_driver raw3270_ccw_driver;
 
+static inline int raw3270_state_final(struct raw3270 *rp)
+{
+	return rp->state == RAW3270_STATE_INIT ||
+		rp->state == RAW3270_STATE_READY;
+}
+
 /*
  * Setup 3270 device configured as console.
  */