dax: Rename some functions

Remove mentions of 'radix' and 'radix tree'.  Simplify some names by
dropping the word 'mapping'.

Signed-off-by: Matthew Wilcox <willy@infradead.org>
This commit is contained in:
Matthew Wilcox 2018-03-27 13:39:38 -04:00
commit a77d19f46a