drm/exynos: decon: remove unused variables

This patch just removes unused variables, i and ret.
Signed-off-by: NInki Dae <inki.dae@samsung.com>
Reviewed-by: NJavier Martinez Canillas <javier@osg.samsung.com>

drivers/gpu/drm/exynos/exynos5433_drm_decon.c

@@ -377,8 +377,6 @@ static void decon_swreset(struct decon_context *ctx)
 static void decon_enable(struct exynos_drm_crtc *crtc)
 {
 	struct decon_context *ctx = crtc->ctx;
-	int ret;
-	int i;
 
 	if (!test_and_clear_bit(BIT_SUSPENDED, &ctx->flags))
 		return;