fix(sys-kernel/coreos-kernel): Add assorted SCSI adapters for VMware.

VMware can emulate buslogic, lsilogic, and its own pvscsi adapters.
Build the whole lot of related devices into the kernel to ensure CoreOS
boots on any of them.
Merge pull request #191 from marineam/scsi

fix(sys-kernel/coreos-kernel): Add assorted SCSI adapters for VMware.