[Mod] 优化systick 退出实现

MBL/platform/gdm32/systick.c

@@ -66,9 +66,11 @@ void systick_config(void)
 */
 void systick_deinit(void)
 {
-	SysTick_Config(1);
-
 	NVIC_SetPriority(SysTick_IRQn, priority_orig);
+
+    SysTick->LOAD  = 0UL;                         /* set reload register */
+    SysTick->VAL   = 0UL;                         /* Load the SysTick Counter Value */
+    SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;   /* Enable SysTick IRQ and SysTick Timer */
 }
 
 /*!