drm/tegra: Remove redundant zeroing out of memory

The DRM core now zeroes out the memory associated with CRTC, encoder and
connector objects upon cleanup, so there's no need to explicitly do that
in drivers anymore.

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

drivers/gpu/drm/tegra/dc.c

@@ -895,15 +895,9 @@ static int tegra_dc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb,
 	return 0;
 }
 
-static void drm_crtc_clear(struct drm_crtc *crtc)
-{
-	memset(crtc, 0, sizeof(*crtc));
-}
-
 static void tegra_dc_destroy(struct drm_crtc *crtc)
 {
 	drm_crtc_cleanup(crtc);
-	drm_crtc_clear(crtc);
 }
 
 static const struct drm_crtc_funcs tegra_crtc_funcs = {

drivers/gpu/drm/tegra/output.c

@@ -98,16 +98,10 @@ tegra_connector_detect(struct drm_connector *connector, bool force)
 	return status;
 }
 
-static void drm_connector_clear(struct drm_connector *connector)
-{
-	memset(connector, 0, sizeof(*connector));
-}
-
 static void tegra_connector_destroy(struct drm_connector *connector)
 {
 	drm_connector_unregister(connector);
 	drm_connector_cleanup(connector);
-	drm_connector_clear(connector);
 }
 
 static const struct drm_connector_funcs connector_funcs = {
@@ -117,15 +111,9 @@ static const struct drm_connector_funcs connector_funcs = {
 	.destroy = tegra_connector_destroy,
 };
 
-static void drm_encoder_clear(struct drm_encoder *encoder)
-{
-	memset(encoder, 0, sizeof(*encoder));
-}
-
 static void tegra_encoder_destroy(struct drm_encoder *encoder)
 {
 	drm_encoder_cleanup(encoder);
-	drm_encoder_clear(encoder);
 }
 
 static const struct drm_encoder_funcs encoder_funcs = {