staging: unisys: visorchipset: Use correct type for dev_no

visorchipset_bus_info.dev_no is only assigned the value of
controlvm_message_packet.create_bus.dev_count, which is a u32. No
point promoting it to a u64.
Signed-off-by: NJes Sorensen <Jes.Sorensen@redhat.com>
Tested-by: NBenjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/visorchipset/visorchipset.h

@@ -141,8 +141,7 @@ struct visorchipset_bus_info {
 	struct controlvm_message_header pending_msg_hdr;/* CONTROLVM MsgHdr */
 	/** For private use by the bus driver */
 	void *bus_driver_context;
-	u64 dev_no;
-
+	u32 dev_no;
 };
 
 static inline struct visorchipset_bus_info *