Staging: hv: Update the TODO file

Now that all vmbus audit related comments have been addressed,
update the TODO file to reflect this.
Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/TODO

 TODO:
-	- audit the vmbus to verify it is working properly with the
-	  driver model
 	- audit the network driver
 	  - checking for carrier inside open is wrong, network device API
             confusion??