libxl_driver: Indent LIBXL_VBD_SECTOR_SIZE macro correctly
libxl_driver: Indent LIBXL_VBD_SECTOR_SIZE macro correctly

Because of change in caaa1bd357a99ad this macro is no under
#ifdef block. That means it needs to be re-intended correctly.

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

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