Move the async flag header to supervisor/shared

py/ is kept for the core; circuitpy_async_flag.h becomes
supervisor/shared/async_flag.h. No code changes.

Author: lynt-smitka

ports/atmel-samd/common-hal/busio/SPI.h

@@ -15,7 +15,7 @@
 #include "hal/include/hal_spi_m_sync.h"
 
 #include "py/obj.h"
-#include "py/circuitpy_async_flag.h"
+#include "supervisor/shared/async_flag.h"
 
 typedef struct {
     mp_obj_base_t base;

ports/espressif/common-hal/busio/SPI.h

@@ -7,7 +7,7 @@
 #pragma once
 
 #include "py/mpconfig.h"
-#include "py/circuitpy_async_flag.h"
+#include "supervisor/shared/async_flag.h"
 #include "driver/spi_master.h"
 #include "shared-bindings/microcontroller/Pin.h"
 

ports/raspberrypi/common-hal/busio/SPI.h

@@ -9,7 +9,7 @@
 #include "common-hal/microcontroller/Pin.h"
 
 #include "py/obj.h"
-#include "py/circuitpy_async_flag.h"
+#include "supervisor/shared/async_flag.h"
 
 #include "hardware/spi.h"
 

shared-bindings/busio/SPI.h

@@ -7,7 +7,7 @@
 #pragma once
 
 #include "py/obj.h"
-#include "py/circuitpy_async_flag.h"
+#include "supervisor/shared/async_flag.h"
 
 #include "common-hal/microcontroller/Pin.h"
 #include "common-hal/busio/SPI.h"