EDP: remove old system EDP framework (sound drivers)

EDP: remove old system EDP framework (sound drivers)

Revised system edp software framework has been put in place. This
patch removes old system edp client code from tegra_aic326x,
tegra_cs42l73, tegra_max98090, tegra_rt5639, and tegra_rt5640 sound
drivers.

Bug 1431977

Change-Id: I2d35b5b6a4d01e765f429a6d397af3f4a3a1c00c
Signed-off-by: Timo Alho <talho@nvidia.com>
Reviewed-on: http://git-master/r/350417
Reviewed-by: Dara Ramesh <dramesh@nvidia.com>
Reviewed-by: Juha Tukkinen <jtukkinen@nvidia.com>