qemu_command: Fix IOMMU validator name in two comments
qemu_command: Fix IOMMU validator name in two comments

When building command line for IOMMU or machine, there are two
comments which mention function that validate IOMMU. But they
both refer to old name which was changed in v6.3.0-rc1~246.

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

libvirt/libvirt,crobinso/libvirt,zippy2/libvirt,jardasgit/libvirt,libvirt/libvirt,jardasgit/libvirt,crobinso/libvirt,nertpinx/libvirt,jfehlig/libvirt,jfehlig/libvirt,jfehlig/libvirt,olafhering/libvirt,jardasgit/libvirt,olafhering/libvirt,nertpinx/libvirt,jfehlig/libvirt,zippy2/libvirt,zippy2/libvirt,jardasgit/libvirt,olafhering/libvirt,nertpinx/libvirt,crobinso/libvirt,olafhering/libvirt,libvirt/libvirt,nertpinx/libvirt,jardasgit/libvirt,zippy2/libvirt,crobinso/libvirt,nertpinx/libvirt,libvirt/libvirt