xpp: add xpd method span_assigned

Add an phone device XPD method called 'span_assigned' that gets
called when the XPD's span is assigned.

Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>

drivers/dahdi/xpp/xpp_dahdi.c

@@ -1020,6 +1020,8 @@ void xpp_span_assigned(struct dahdi_span *span)
 		span->alarms &= ~DAHDI_ALARM_NOTOPEN;
 		dahdi_alarm_notify(&phonedev->span);
 	}
+	if (PHONE_METHOD(span_assigned, xpd))
+		CALL_PHONE_METHOD(span_assigned, xpd);
 }
 EXPORT_SYMBOL(xpp_span_assigned);
 

drivers/dahdi/xpp/xproto.h

@@ -295,6 +295,7 @@ struct phoneops {
 	int (*card_open) (xpd_t *xpd, lineno_t pos);
 	int (*card_close) (xpd_t *xpd, lineno_t pos);
 	int (*card_state) (xpd_t *xpd, bool on);
+	int (*span_assigned) (xpd_t *xpd);
 };
 
 struct xops {