opal.h: s/uintXX_t/__beXX/ to match with linux and sparse in the future
opal.h: s/uintXX_t/__beXX/ to match with linux and sparse in the future

The __be64 (etc) annotations are likely going to be useful in the future
if/when we start running sparse around skiboot and it's already useful
in linux, so it's completely harmless having __be64 rather than uint64_t
in skiboot.

Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.vnet.ibm.com>

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