drm/tegra: dc - Reshuffle code to get rid of prototypes

The tegra_dc_format() and tegra_dc_setup_window() functions are only
used internally by the display controller driver. Move them upwards in
order to make them static and get rid of the function prototypes.

Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --cc drivers/gpu/drm/tegra/dc.c
Simple merge

diff --cc drivers/gpu/drm/tegra/drm.h
Simple merge