mmc: meson-gx: include tx phase in the tuning process

mmc: meson-gx: include tx phase in the tuning process

It has been reported that some platforms (odroid-c2) may require
a different tx phase setting to operate at high speed (hs200 and hs400)

To improve the situation, this patch includes tx phase in the tuning
process.

Fixes: d341ca88eead ("mmc: meson-gx: rework tuning function")
Reported-by: Heiner Kallweit <[email protected]>
Signed-off-by: Jerome Brunet <[email protected]>
Reviewed-by: Kevin Hilman <[email protected]>
Signed-off-by: Ulf Hansson <[email protected]>