Staging: hv: vmbus: Increase the timeout for some critical calls

Increase the timeout for some critical calls. In testing we discovered that the
current timeout of 1 second was insufficient under some conditions.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Abhishek Kane <v-abkane@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>