Add i.MX8MN to blacklist, so that imx-cpufreq-dt driver can handle
speed grading bits just like other i.MX8M SoCs.

Signed-off-by: Anson Huang <redacted>
Reviewed-by: Leonard Crestez <redacted>
---
No changes.
---
 drivers/cpufreq/cpufreq-dt-platdev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
index ec2057d..febcec8 100644
--- a/drivers/cpufreq/cpufreq-dt-platdev.c
+++ b/drivers/cpufreq/cpufreq-dt-platdev.c

@@ -109,6 +109,7 @@ static const struct of_device_id blacklist[] __initconst = {
 	{ .compatible = "fsl,imx7d", },
 	{ .compatible = "fsl,imx8mq", },
 	{ .compatible = "fsl,imx8mm", },
+	{ .compatible = "fsl,imx8mn", },
 
 	{ .compatible = "marvell,armadaxp", },