fixup "base: introduce caching attributes (fix #1184)"
fixup "base: introduce caching attributes (fix #1184)"
squash "base: introduce caching attributes" (NOT_CACHED -> UNCACHED)

This patch renames the enum value NOT_CACHED to UNCACHED. It is probably
a matter of taste. In conversations, we often say "uncached page" or
"uncached mapping" but never "not cached page" or "not cached mapping".
So "UNCACHED" seems more natural than "NOT_CACHED". Also, it is shorter.

@skalk Are you fine with the rename?