Bluetooth: btusb: Fix BT_HCIBTUSB_AUTOSUSPEND Kconfig option name

Fix: drivers/bluetooth/Kconfig:35:warning: multi-line strings not
supported warning.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/Kconfig

@@ -32,7 +32,7 @@ config BT_HCIBTUSB
 	  kernel or say M to compile it as module (btusb).
 
 config BT_HCIBTUSB_AUTOSUSPEND
-	bool "Enable USB autosuspend for Bluetooth USB devices by default.
+	bool "Enable USB autosuspend for Bluetooth USB devices by default"
 	depends on BT_HCIBTUSB
 	help
 	  Say Y here to enable USB autosuspend for Bluetooth USB devices by