hv: vmbus: missing curly braces in vmbus_process_offer()

The indenting makes it clear that there were curly braces intended here.

Fixes: 2dd37cb8 ('Drivers: hv: vmbus: Handle both rescind and offer messages in the same context')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>