[LL][TIM] Update __LL_TIM_CALC_PSC() macro to round up the evaluate value when the fractional part of the division is greater than 0.5

Inc/stm32f3xx_ll_tim.h

diff --git a/Inc/stm32f3xx_ll_tim.h b/Inc/stm32f3xx_ll_tim.h
index 2e76081..7c9cffe 100644
--- a/Inc/stm32f3xx_ll_tim.h
+++ b/Inc/stm32f3xx_ll_tim.h
@@ -1335,7 +1335,7 @@
   * @retval Prescaler value  (between Min_Data=0 and Max_Data=65535)
   */
 #define __LL_TIM_CALC_PSC(__TIMCLK__, __CNTCLK__)   \
-  (((__TIMCLK__) >= (__CNTCLK__)) ? (uint32_t)(((__TIMCLK__)/(__CNTCLK__)) - 1U) : 0U)
+  (((__TIMCLK__) >= (__CNTCLK__)) ? (uint32_t)((((__TIMCLK__) + (__CNTCLK__)/2U)/(__CNTCLK__)) - 1U) : 0U)
 
 /**
   * @brief  HELPER macro calculating the auto-reload value to achieve the required output signal frequency.