qemu_conf: split out virQEMUDriverConfigLoadDeviceEntry
qemu_conf: split out virQEMUDriverConfigLoadDeviceEntry

Split out parts of the config parsing code to make
the parent function easier to read.

Signed-off-by: Ján Tomko <4cab11cfb98d3c937327354a78eb07dbb6ee2bc6@redhat.com>
Reviewed-by: John Ferlan <87558058f6f829e5ec976c8ef960720af4ff9c7d@redhat.com>

eskultety/libvirt,andreabolognani/libvirt,crobinso/libvirt,eskultety/libvirt,nertpinx/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,jardasgit/libvirt,zippy2/libvirt,zippy2/libvirt,zippy2/libvirt,libvirt/libvirt,eskultety/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,eskultety/libvirt,crobinso/libvirt,libvirt/libvirt,libvirt/libvirt,olafhering/libvirt,libvirt/libvirt,jardasgit/libvirt,jardasgit/libvirt,andreabolognani/libvirt,zippy2/libvirt,crobinso/libvirt,jfehlig/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,nertpinx/libvirt,olafhering/libvirt,olafhering/libvirt,andreabolognani/libvirt,nertpinx/libvirt,jardasgit/libvirt,jfehlig/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,olafhering/libvirt,crobinso/libvirt,eskultety/libvirt,andreabolognani/libvirt