Bluetooth: Rename hdev->inq_cache to hdev->discovery

This struct is used for not just inquiry caching but also for general
device discovery state tracking so it's better to rename it to something
more appropriate.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/bluetooth/hci_sysfs.c b/net/bluetooth/hci_sysfs.c
index 3600d78..74b49e3 100644
--- a/net/bluetooth/hci_sysfs.c
+++ b/net/bluetooth/hci_sysfs.c
@@ -383,7 +383,7 @@
 static int inquiry_cache_show(struct seq_file *f, void *p)
 {
 	struct hci_dev *hdev = f->private;
-	struct inquiry_cache *cache = &hdev->inq_cache;
+	struct discovery_state *cache = &hdev->discovery;
 	struct inquiry_entry *e;
 
 	hci_dev_lock(hdev);