Regression Bug Fix: Fix Incorrect Return of MSVC-MingW portYIELD_FROM_ISR (#1207)

There is a regression issue introduced in
    cfc2688.
    This PR was intended to update MIT licensed header from v9 to v10.
    But it accidentally changed "portYIELD_FROM_ISR( x )" in MSVC-MingW/portmacro.h.
    It caused "portYIELD_FROM_ISR( x )" does not return correct value to "prvProcessSimulatedInterrupts".

Author: wwhheerree

portable/MSVC-MingW/portmacro.h

@@ -112,7 +112,7 @@ extern volatile BaseType_t xInsideInterrupt;
 
 /* Simulated interrupts return pdFALSE if no context switch should be performed,
  * or a non-zero number if a context switch should be performed. */
-#define portYIELD_FROM_ISR( x )       ( void ) x
+#define portYIELD_FROM_ISR( x )       return x
 #define portEND_SWITCHING_ISR( x )    portYIELD_FROM_ISR( ( x ) )
 
 void vPortCloseRunningThread( void * pvTaskToDelete,