iio: trigger: stm32-timer: Make use of device properties

Convert the module to be property provider agnostic and allow
it to be used on non-OF platforms.

Signed-off-by: Andy Shevchenko <[e-mail]>
Reviewed-by: Fabrice Gasnier <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/trigger/Kconfig

···
 
 config IIO_STM32_TIMER_TRIGGER
 	tristate "STM32 Timer Trigger"
-	depends on (ARCH_STM32 && OF && MFD_STM32_TIMERS) || COMPILE_TEST
+	depends on (ARCH_STM32 && MFD_STM32_TIMERS) || COMPILE_TEST
 	help
 	  Select this option to enable STM32 Timer Trigger
 

drivers/iio/trigger/stm32-timer-trigger.c

···
 #include <linux/iio/timer/stm32-timer-trigger.h>
 #include <linux/iio/trigger.h>
 #include <linux/mfd/stm32-timers.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
-#include <linux/of_device.h>
+#include <linux/property.h>
 
 #define MAX_TRIGGERS 7
 #define MAX_VALIDS 5
···
 	unsigned int index;
 	int ret;
 
-	if (of_property_read_u32(dev->of_node, "reg", &index))
-		return -EINVAL;
+	ret = device_property_read_u32(dev, "reg", &index);
+	if (ret)
+		return ret;
 
-	cfg = (const struct stm32_timer_trigger_cfg *)
-		of_match_device(dev->driver->of_match_table, dev)->data;
+	cfg = device_get_match_data(dev);
 
 	if (index >= ARRAY_SIZE(triggers_table) ||
 	    index >= cfg->num_valids_table)