The set-plls script was running too quickly, and could sometimes
finish before the PLLs were stable. This patch fixes this problem,
in addition to making it clearer what the various settings do.
Signed-off-by: Sean Cross <xobs@kosagi.com>
PSRAM was failing on some newer parts. This change writes additional
values to the EMI controller early on that seems to fix the problems.
Signed-off-by: Sean Cross <xobs@kosagi.com>