Use new module hierarchy for Timer Driver.

zephyr/modules/owntech_timer_driver/zephyr/CMakeLists.txt

-
 if(CONFIG_OWNTECH_TIMER_DRIVER)
-  zephyr_include_directories(.)
-
+  zephyr_include_directories(./public_include)
   zephyr_library()
   zephyr_library_sources(
-    stm32_timer_driver.c
+    ./src/stm32_timer_driver.c
     )
 endif()

zephyr/modules/owntech_timer_driver/zephyr/Kconfig

-
 config OWNTECH_TIMER_DRIVER
 	bool "Enable timer driver by OwnTech (only STM32 timer partial support for now)"
 	default y

zephyr/modules/owntech_timer_driver/zephyr/stm32_timer_driver.c → zephyr/modules/owntech_timer_driver/zephyr/src/stm32_timer_driver.c

@@ -72,7 +72,7 @@ static const struct timer_driver_api timer_funcs =
 {
 	.config    = timer_stm32_config,
 	.start     = timer_stm32_start,
-	.get_count = timer_stm32_get_count,
+	.get_count = timer_stm32_get_count
 };
 
 void timer_stm32_config(const struct device* dev, const struct timer_config_t* config)