[PATCH v2 13/16] mmc: meson-gx: use CCF to handle the clock phases

Jerome Brunet [off-list ref] writes:

Several phases can be controlled on the meson-gx controller, the core, tx
and rx clock phase. The tx and rx uses delays to allow for a more fine
grained setting of the phase. To properly compute the phase using delays,
accessing the clock rate is necessary.

Instead of ad-hoc functions, use the common clock framework to set the
clock phases (and access the clock rate while doing it).

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>

I have to admit to not fully understanding the MMC tuning aspsects here,
but I like this approach to using the clock framework for handling the
extra clocks.

Acked-by: Kevin Hilman <khilman@baylibre.com>