[HAL][MMC] Update MMC High Speed clock

Src/stm32h7xx_hal_mmc.c

diff --git a/Src/stm32h7xx_hal_mmc.c b/Src/stm32h7xx_hal_mmc.c
index 199b459..b8abb36 100644
--- a/Src/stm32h7xx_hal_mmc.c
+++ b/Src/stm32h7xx_hal_mmc.c
@@ -4043,7 +4043,7 @@
             }
             else
             {
-              Init.ClockDiv = (sdmmc_clk / (2U * MMC_HIGH_SPEED_FREQ)) + 1U;
+              Init.ClockDiv = sdmmc_clk / (2U * MMC_HIGH_SPEED_FREQ);
             }
             (void)SDMMC_Init(hmmc->Instance, Init);