capi: Use existing #defines
capi: Use existing #defines

Use #defines rather than magic numbers.

No functional change.

Signed-off-by: Michael Neuling <7b0ab45a730e48a69239010b5b8fe5fa4e8eaac6@neuling.org>
Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.vnet.ibm.com>

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