change OSAL_TASK_FUNCTION to adapt with cmsis rtx

tinyusb/osal/osal_common.h

@@ -52,6 +52,10 @@
 
 #include "common/common.h"
 
+#ifdef __CC_ARM
+#pragma diag_suppress 66 // Suppress Keil warnings #66-D: enumeration value is out of "int" range
+#endif
+
 enum
 {
   OSAL_TIMEOUT_NOTIMEOUT    = 0,  // for use within ISR,  return immediately
@@ -59,6 +63,10 @@ enum
   OSAL_TIMEOUT_WAIT_FOREVER = 0xFFFFFFFF
 };
 
+#ifdef __CC_ARM
+#pragma diag_default 66 // return Keil 66 to normal severity
+#endif
+
 static inline uint32_t osal_tick_from_msec(uint32_t msec) ATTR_CONST ATTR_ALWAYS_INLINE;
 static inline uint32_t osal_tick_from_msec(uint32_t msec)
 {