thermal/drivers/imx8mm: Add hwmon support

Expose thermal sensors as HWMON devices.
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Link: https://lore.kernel.org/r/20220726122331.323093-1-alexander.stein@ew.tq-group.comSigned-off-by: Daniel Lezcano <daniel.lezcano@kernel.org>

drivers/thermal/imx8mm_thermal.c

@@ -18,6 +18,7 @@
 #include <linux/thermal.h>
 
 #include "thermal_core.h"
+#include "thermal_hwmon.h"
 
 #define TER			0x0	/* TMU enable */
 #define TPS			0x4
@@ -342,6 +343,9 @@ static int imx8mm_tmu_probe(struct platform_device *pdev)
 			goto disable_clk;
 		}
 		tmu->sensors[i].hw_id = i;
+
+		if (devm_thermal_add_hwmon_sysfs(tmu->sensors[i].tzd))
+			dev_warn(&pdev->dev, "failed to add hwmon sysfs attributes\n");
 	}
 
 	platform_set_drvdata(pdev, tmu);