drm/mediatek: mtk_hdmi: Remove goto in mtk_hdmi_clk_enable_audio()

If the clk_prepare_enable() call for the SPDIF clock fails, just
disable and unprepare the clock in the error check branch and
return immediately instead of jumping to the end with a goto,
slightly reducing code size.

This commit brings no functional changes.

Reviewed-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20250217154836.108895-32-angelogioacchino.delregno@collabora.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

Author: AngeloGioacchino Del Regno

drivers/gpu/drm/mediatek/mtk_hdmi.c

@@ -1159,13 +1159,12 @@ static int mtk_hdmi_clk_enable_audio(struct mtk_hdmi *hdmi)
 		return ret;
 
 	ret = clk_prepare_enable(hdmi->clk[MTK_HDMI_CLK_AUD_SPDIF]);
-	if (ret)
-		goto err;
+	if (ret) {
+		clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_AUD_BCLK]);
+		return ret;
+	}
 
 	return 0;
-err:
-	clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_AUD_BCLK]);
-	return ret;
 }
 
 static void mtk_hdmi_clk_disable_audio(struct mtk_hdmi *hdmi)