vmbus: remove useless return's

No need for empty return at end of void function

Signed-off-by: Stephen Hemminger <[e-mail]>
Signed-off-by: K. Y. Srinivasan <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/hv/hv_balloon.c

···
 						    5*HZ);
 		post_status(&dm_device);
 	}
-
-	return;
 }
 
 static void hv_online_page(struct page *pg)

drivers/hv/hv_fcopy.c

···
 		}
 	}
 	kfree(smsg_out);
-
-	return;
 }
 
 /*

drivers/hv/hv_kvp.c

···
 	}
 
 	kfree(message);
-
-	return;
 }
 
 /*

drivers/hv/hv_snapshot.c

···
 	}
 
 	kfree(vss_msg);
-
-	return;
 }
 
 static void vss_handle_request(struct work_struct *dummy)

drivers/hv/ring_buffer.c

···
 	 */
 	if (old_write == READ_ONCE(rbi->ring_buffer->read_index))
 		vmbus_setevent(channel);
-
-	return;
 }
 
 /* Get the next write location for the specified ring buffer. */

drivers/hv/vmbus_drv.c

···
 
 	if (drv->shutdown)
 		drv->shutdown(dev);
-
-	return;
 }
 
 

include/linux/hyperv.h

···
 	cached_write_sz = hv_get_cached_bytes_to_write(rbi);
 	if (cached_write_sz < pending_sz)
 		vmbus_setevent(channel);
-
-	return;
 }
 
 static inline void