scsi: vmw_pvscsi: Expand vcpuHint to 16 bits

vcpuHint has been expanded to 16 bit on host to enable routing to more
CPUs. Guest side should align with the change. This change has been tested
with hosts with 8-bit and 16-bit vcpuHint, on both platforms host side can
get correct value.

Link: https://lore.kernel.org/r/EF35F4D5-5DCC-42C5-BCC4-29DF1729B24C@vmware.com


Signed-off-by: Wentao Wang <wwentao@vmware.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>