ASoC: ti: omap-mcbsp: Fix runtime PM underflow warnings

[ Upstream commit fbb74e5 ]

We need to check for an active device as otherwise we get warnings
for some mcbsp instances for "Runtime PM usage count underflow!".

Reported-by: Andreas Kemnade <andreas@kemnade.info>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20231030052340.13415-1-tony@atomide.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

sound/soc/ti/omap-mcbsp.c

@@ -74,14 +74,16 @@ static int omap2_mcbsp_set_clks_src(struct omap_mcbsp *mcbsp, u8 fck_src_id)
 		return -EINVAL;
 	}
 
-	pm_runtime_put_sync(mcbsp->dev);
+	if (mcbsp->active)
+		pm_runtime_put_sync(mcbsp->dev);
 
 	r = clk_set_parent(mcbsp->fclk, fck_src);
 	if (r)
 		dev_err(mcbsp->dev, "CLKS: could not clk_set_parent() to %s\n",
 			src);
 
-	pm_runtime_get_sync(mcbsp->dev);
+	if (mcbsp->active)
+		pm_runtime_get_sync(mcbsp->dev);
 
 	clk_put(fck_src);