fb: add support for drivers not needing VT switch at suspend/resume time

Use the new PM routines to indicate whether we need to VT switch at suspend
and resume time.  When a new driver is bound, set its flag accordingly,
and when unbound, remove it from the PM's console tracking list.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 58b9860..d49c60f 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -501,6 +501,8 @@
 			resource_size_t size;
 		} ranges[0];
 	} *apertures;
+
+	bool skip_vt_switch; /* no VT switch on suspend/resume required */
 };
 
 static inline struct apertures_struct *alloc_apertures(unsigned int max_num) {