api: Add Logical Block Provisioning VPD page (B2h) support
api: Add Logical Block Provisioning VPD page (B2h) support

Prepare for the UNMAP command and for now in this VPD code the
UNMAP and Write Same UNMAP are both disabled.

They will be enabled later when needed.

Signed-off-by: Xiubo Li <67e5e1ee902b4e67bce18ea43d9c4b0430ce5e6c@cmss.chinamobile.com>

open-iscsi/tcmu-runner,open-iscsi/tcmu-runner,agrover/tcmu-runner