fix: periman: include it by default, add include guard

Author: pillo79

Diff for: cores/esp32/esp32-hal-periman.h

@@ -4,6 +4,8 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#pragma once
+
 #ifdef __cplusplus
 extern "C"
 {

Diff for: cores/esp32/esp32-hal.h

@@ -86,6 +86,7 @@ void yield(void);
 #include "esp32-hal-psram.h"
 #include "esp32-hal-rgb-led.h"
 #include "esp32-hal-cpu.h"
+#include "esp32-hal-periman.h"
 
 void analogWrite(uint8_t pin, int value);
 void analogWriteFrequency(uint8_t pin, uint32_t freq);