drivers: counter: Fix compilation warning due to deprecated typedef

Counter test compiles with warnings even though
deprecated typedef is not used. It is enough that
it is used in another function which is also
deprecated. Removed __deprecated keyword from
typedef, keeping it only for the function.

Signed-off-by: Krzysztof Chruscinski <[email protected]>

include/counter.h

@@ -67,9 +67,6 @@ struct counter_alarm_cfg {
  */
 typedef void (*counter_wrap_callback_t)(struct device *dev, void *user_data);
 
-__deprecated typedef void (*counter_callback_t)(struct device *dev,
-						void *user_data);
-
 /** @brief Structure with generic counter features.
  *
  * @param max_wrap Maximal (default) wrap value on which counter is reset
@@ -377,6 +374,10 @@ static inline u32_t _impl_counter_get_max_relative_alarm(struct device *dev)
 	return api->get_max_relative_alarm(dev);
 }
 
+/* Deprecated counter callback. */
+typedef void (*counter_callback_t)(struct device *dev,
+						void *user_data);
+
 /**
  * @brief Deprecated function.
  */