drm/exynos/decon5433: enable HDMI-PHY before configuring DECON

According to documentation and tests HDMI-PHY must be on prior
to MIXER configuration.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>

drivers/gpu/drm/exynos/exynos5433_drm_decon.c

@@ -389,6 +389,8 @@ static void decon_enable(struct exynos_drm_crtc *crtc)
 
 	pm_runtime_get_sync(ctx->dev);
 
+	exynos_drm_pipe_clk_enable(crtc, true);
+
 	set_bit(BIT_CLKS_ENABLED, &ctx->flags);
 
 	decon_swreset(ctx);
@@ -420,6 +422,8 @@ static void decon_disable(struct exynos_drm_crtc *crtc)
 
 	clear_bit(BIT_CLKS_ENABLED, &ctx->flags);
 
+	exynos_drm_pipe_clk_enable(crtc, false);
+
 	pm_runtime_put_sync(ctx->dev);
 
 	set_bit(BIT_SUSPENDED, &ctx->flags);