freertos: add API for getting tick rate on C3

components/freertos/port/riscv/include/freertos/portmacro.h

@@ -294,6 +294,9 @@ void vApplicationSleep( TickType_t xExpectedIdleTime );
 #define portVALID_TCB_MEM(ptr) esp_ptr_byte_accessible(ptr)
 #define portVALID_STACK_MEM(ptr) esp_ptr_byte_accessible(ptr)
 
+/* Get tick rate per second */
+uint32_t xPortGetTickRateHz(void);
+
 // configASSERT_2 if requested
 #if configASSERT_2
 #include <stdio.h>

components/freertos/port/riscv/port.c

@@ -309,6 +309,10 @@ void vPortSetStackWatchpoint(void *pxStackStart)
     esp_set_watchpoint(7, (char *)addr, STACK_WATCH_AREA_SIZE, ESP_WATCHPOINT_STORE);
 }
 
+uint32_t xPortGetTickRateHz(void) {
+	return (uint32_t)configTICK_RATE_HZ;
+}
+
 BaseType_t xPortInIsrContext(void)
 {
     return uxInterruptNesting;