unexpectedmaker_tinywatch_s3: Fix power shutdown pin

Author: prplz

ports/espressif/boards/unexpectedmaker_tinywatch_s3/board.c

@@ -25,5 +25,23 @@
  */
 
 #include "supervisor/board.h"
+#include "shared-bindings/microcontroller/Pin.h"
+#include "components/driver/include/driver/gpio.h"
+
+bool espressif_board_reset_pin_number(gpio_num_t pin_number) {
+    // Pull USER_PWR_SHUTDOWN down (pull up shuts down power)
+    if (pin_number == 21) {
+        gpio_config_t cfg = {
+            .pin_bit_mask = BIT64(pin_number),
+            .mode = GPIO_MODE_DISABLE,
+            .pull_up_en = false,
+            .pull_down_en = true,
+            .intr_type = GPIO_INTR_DISABLE,
+        };
+        gpio_config(&cfg);
+        return true;
+    }
+    return false;
+}
 
 // Use the MP_WEAK supervisor/shared/board.c versions of routines not defined here.