net: openthread: support Wake-up End Device without CSL receiver

Make it possible to enable Wake-up End Device feature with
CSL receiver disabled (to receive wake-up frames on MED).

Signed-off-by: Damian Krolik <[email protected]>

Author: Damian-Nordic

modules/openthread/platform/openthread-core-zephyr-config.h

@@ -211,8 +211,9 @@
  *
  */
 #define OPENTHREAD_CONFIG_PLATFORM_USEC_TIMER_ENABLE                                               \
-	(CONFIG_OPENTHREAD_CSL_RECEIVER &&                                                         \
-	 (OPENTHREAD_CONFIG_THREAD_VERSION >= OT_THREAD_VERSION_1_2))
+	((CONFIG_OPENTHREAD_CSL_RECEIVER &&                                                        \
+	  (OPENTHREAD_CONFIG_THREAD_VERSION >= OT_THREAD_VERSION_1_2)) ||                          \
+	 CONFIG_OPENTHREAD_WAKEUP_END_DEVICE)
 
 /* Zephyr does not use OpenThread's heap. mbedTLS will use heap memory allocated
  * by Zephyr. Here, we use some dummy values to prevent OpenThread warnings.

modules/openthread/platform/radio.c

@@ -802,7 +802,7 @@ otError otPlatRadioReceive(otInstance *aInstance, uint8_t aChannel)
 	return OT_ERROR_NONE;
 }
 
-#if defined(CONFIG_OPENTHREAD_CSL_RECEIVER)
+#if defined(CONFIG_OPENTHREAD_CSL_RECEIVER) || defined(CONFIG_OPENTHREAD_WAKEUP_END_DEVICE)
 otError otPlatRadioReceiveAt(otInstance *aInstance, uint8_t aChannel,
 			     uint32_t aStart, uint32_t aDuration)
 {