Staging: hv: Add Haiyang's email to the TODO file

Add Haiyang's email to the TODO file.

Cc: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/TODO

@@ -12,5 +12,5 @@ TODO:
 	- audit the block driver
 	- audit the scsi driver
 
-Please send patches for this code to Greg Kroah-Hartman <gregkh@suse.de>
-and Hank Janssen <hjanssen@microsoft.com>
+Please send patches for this code to Greg Kroah-Hartman <gregkh@suse.de>,
+Hank Janssen <hjanssen@microsoft.com>, and Haiyang Zhang <haiyangz@microsoft.com>.