remoteproc: k3-dsp: Fix unbalanced state machine in k3_dsp_start

The global module reset is deasserted through the ti_sci_power_domain_on()
call in k3_dsp_start(), but is not asserted back if the local module reset
fails. Fix this.

While at this, remove the stale comment about assigned-clock-rates that
seems to have been copied from the K3 ARM64 Remoteproc driver.

Fixes: ab827b385718 ("remoteproc: Introduce K3 C66 and C71 remoteproc driver")
Signed-off-by: Suman Anna <s-anna@ti.com>
diff --git a/drivers/remoteproc/ti_k3_dsp_rproc.c b/drivers/remoteproc/ti_k3_dsp_rproc.c
index 09e050f..ff5d7f7 100644
--- a/drivers/remoteproc/ti_k3_dsp_rproc.c
+++ b/drivers/remoteproc/ti_k3_dsp_rproc.c
@@ -102,16 +102,14 @@
 	ret = ti_sci_proc_request(&dsp->tsp);
 	if (ret)
 		return ret;
-	/*
-	 * Setting the right clock frequency would have taken care by
-	 * assigned-clock-rates during the device probe. So no need to
-	 * set the frequency again here.
-	 */
+
 	ret = ti_sci_proc_power_domain_on(&dsp->tsp);
 	if (ret)
 		goto proc_release;
 
 	ret = reset_deassert(&dsp->dsp_rst);
+	if (ret)
+		ti_sci_proc_power_domain_off(&dsp->tsp);
 
 proc_release:
 	ti_sci_proc_release(&dsp->tsp);