- change OSAL_TASK_FUNCTION to have void* parameter (to be consistent with most popular RTOS)

- add new error enum TUSB_ERROR_OSAL_TASK_CREATE_FAILED
- move usbh_enumeration_task prototype to usbh.h
- change OSAL_SUBTASK_INVOKED_AND_WAIT behavior, will not "return" in calling task when subtask got error status.
calling task need to do that after the call
- osal_queue_receive signature from uint32_t* to void*

- implement osal_freertos.h for FreeRTOS 7.3 --> able to compile & build host_freertos
+ OSAL_TASK_FUNCTION
+ turn on FPU for M4 in both host_os_none & host_freertos (freertos requires FPU to be on to compile)
+ osal_task_create
+ OSAL_SUBTASK_INVOKED_AND_WAIT
+ SUBTASK_ASSERT
+ osal_semaphore_reset
+ osal_queue_flush
+ adding heap_1.c for memory management

tinyusb/common/errors.h

@@ -68,8 +68,9 @@
     ENTRY(TUSB_ERROR_USBH_MOUNT_DEVICE_NOT_RESPOND)\
     ENTRY(TUSB_ERROR_USBH_MOUNT_CONFIG_DESC_TOO_LONG)\
     ENTRY(TUSB_ERROR_OSAL_TIMEOUT)\
-    ENTRY(TUSB_ERROR_OSAL_WAITING)\
+    ENTRY(TUSB_ERROR_OSAL_WAITING) /* only used by OSAL_NONE in the subtask */ \
     ENTRY(TUSB_ERROR_OSAL_TASK_FAILED)\
+    ENTRY(TUSB_ERROR_OSAL_TASK_CREATE_FAILED)\
     ENTRY(TUSB_ERROR_OSAL_QUEUE_FAILED)\
     ENTRY(TUSB_ERROR_OSAL_SEMAPHORE_FAILED)\
     ENTRY(TUSB_ERROR_EHCI_NOT_ENOUGH_QTD)\