uwb: add symlinks in sysfs between radio controllers and PALs

Add a facility for PALs to have symlinks to their radio controller
(and vice-versa) and make WUSB host controllers use this.

Signed-off-by: David Vrabel <david.vrabel@csr.com>
diff --git a/include/linux/uwb.h b/include/linux/uwb.h
index 0cd3593..f9ccbd9 100644
--- a/include/linux/uwb.h
+++ b/include/linux/uwb.h
@@ -361,6 +361,9 @@
 
 /**
  * struct uwb_pal - a UWB PAL
+ * @name:    descriptive name for this PAL (wushc, wlp, etc.).
+ * @device:  a device for the PAL.  Used to link the PAL and the radio
+ *           controller in sysfs.
  * @new_rsv: called when a peer requests a reservation (may be NULL if
  *           the PAL cannot accept reservation requests).
  *
@@ -379,7 +382,8 @@
  */
 struct uwb_pal {
 	struct list_head node;
-
+	const char *name;
+	struct device *device;
 	void (*new_rsv)(struct uwb_rsv *rsv);
 };