PowerNV: move LPCR and LPID altering to cpudep_ap_early_bootstrap

It turns out that under some circumstances we can get DSI or DSE before we set
LPCR and LPID so we should set it as early as possible.

Authored by: Patryk Duda <pdk@semihalf.com>
Submitted by: Wojciech Macek <wma@semihalf.com>
Obtained from: Semihalf
Sponsored by: IBM, QCM Technologies