remoteproc/mediatek: unprepare clk if scp_before_load fails

Fixes the error handling to unprepare clk if scp_before_load fails.
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Fixes: fd0b6c1f ("remoteproc/mediatek: Add support for mt8192 SCP")
Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20201203155914.3844426-1-tzungbi@google.comSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

drivers/remoteproc/mtk_scp.c

@@ -350,9 +350,10 @@ static int scp_load(struct rproc *rproc, const struct firmware *fw)
 
 	ret = scp->data->scp_before_load(scp);
 	if (ret < 0)
-		return ret;
+		goto leave;
 
 	ret = scp_elf_load_segments(rproc, fw);
+leave:
 	clk_disable_unprepare(scp->clk);
 
 	return ret;