FFL-2467: Activate more kernel drivers for virtual machines
There are several drivers in the Linux kernel for virtualized hardware.
While we already have things activated for Xen and QEMU/KVM, running
fli4l in VMware was not well supported, yet. This is a bunch of drivers
activated useful for running fli4l in VMware, especially 'vmw_pvscsi'
for virtual hard discs, and also more.
This is done for x86_64 only, because it's our current policy to
build the virt package for 64 bit PC platform only. (That was the
reasoning when dropping the specialized 'virt' kernels we had in the
past.)
Note: more commits will follow to actually install those kernel modules
to the target.
