wwan_led: Read + report status changes of WWAN LED inputs

firmware/src_simtrace/main.c

@@ -7,6 +7,7 @@
 #include "simtrace.h"
 #include "utils.h"
 #include "req_ctx.h"
+#include "wwan_led.h"
 
 uint32_t g_unique_id[4];
 
@@ -278,6 +279,8 @@ extern int main(void)
 
 	PIO_InitializeInterrupts(0);
 
+	wwan_led_init();
+
 	EEFC_ReadUniqueID(g_unique_id);
 
         printf("\r\n\r\n"