p8-i2c: Keep centaur OCC cache disabled during inits
p8-i2c: Keep centaur OCC cache disabled during inits

To avoid possible XSCOM collisions

Signed-off-by: Benjamin Herrenschmidt <a7089bb6e7e92505d88aaff006cbdd60cc9120b6@kernel.crashing.org>
Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.vnet.ibm.com>

mikey/skiboot,ddstreet/skiboot,shenki/skiboot,stewart-ibm/skiboot,shenki/skiboot,legoater/skiboot,shenki/skiboot,csmart/skiboot,open-power/skiboot,qemu/skiboot,mikey/skiboot,stewart-ibm/skiboot,ddstreet/skiboot,apopple/skiboot,qemu/skiboot,open-power/skiboot,mikey/skiboot,open-power/skiboot,qemu/skiboot,qemu/skiboot,open-power/skiboot,legoater/skiboot,apopple/skiboot,ddstreet/skiboot,apopple/skiboot,legoater/skiboot,csmart/skiboot,open-power/skiboot,qemu/skiboot,shenki/skiboot,csmart/skiboot,legoater/skiboot,shenki/skiboot,stewart-ibm/skiboot,legoater/skiboot