fsp/rtc: Change properties used to advertize TPO
fsp/rtc: Change properties used to advertize TPO

Signed-off-by: Benjamin Herrenschmidt <a7089bb6e7e92505d88aaff006cbdd60cc9120b6@kernel.crashing.org>

legoater/skiboot,stewart-ibm/skiboot,neelegup/skiboot,legoater/skiboot,csmart/skiboot,qemu/skiboot,qemu/skiboot,neelegup/skiboot,open-power/skiboot,stewart-ibm/skiboot,ddstreet/skiboot,open-power/skiboot,shenki/skiboot,shenki/skiboot,jk-ozlabs/skiboot,csmart/skiboot,open-power/skiboot,apopple/skiboot,cyrilbur-ibm/skiboot,mikey/skiboot,open-power/skiboot,cyrilbur-ibm/skiboot,jk-ozlabs/skiboot,mikey/skiboot,cyrilbur-ibm/skiboot,qemu/skiboot,stewart-ibm/skiboot,mikey/skiboot,ddstreet/skiboot,apopple/skiboot,legoater/skiboot,legoater/skiboot,csmart/skiboot,jk-ozlabs/skiboot,open-power/skiboot,qemu/skiboot,legoater/skiboot,ddstreet/skiboot,shenki/skiboot,shenki/skiboot,qemu/skiboot,shenki/skiboot,neelegup/skiboot,apopple/skiboot