PACKAGES =+ "tslib-conf libts-dev tslib-tests tslib-calibrate"
DEBIAN_NOAUTONAME_tslib-conf = "1"
DEBIAN_NOAUTONAME_tslib-tests = "1"
DEBIAN_NOAUTONAME_tslib-calibrate = "1"

RDEPENDS_${PN} = "tslib-conf"

gives me

Package: libts-0.0-0
Version: 1.0-r0
Depends: libts-0.0-conf, libc6 (>= 2.4), libgcc1 (>= 4.1.1)
         ^^^^^^^^^^^^^^