Commit 'b09d6d99' removes include/linux/clk-private.h and
re-arranges the clock related structures contained in it in
different files. The documentation has not been updated
accordingly, thus it wasn't anymore consistent.

Place the structures referenced by Documentation/clk.txt in the
correct files and update their contents to the latest status.
Signed-off-by: NAndi Shyti <andi.shyti@samsung.com>
[geert: Fix path to clk.c, whitespace, more clk_core, ...]
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>