trivial: pci_psp: test an attribute to declare missing data
trivial: pci_psp: test an attribute to declare missing data

If the system loads ccp but the ccp driver doesn't export attributes
we should mark the CPU plugin as not supported.

fwupd/fwupd,fwupd/fwupd,fwupd/fwupd,fwupd/fwupd