update docs

Signed-off-by: NAnnie_wang <annie.wangli@huawei.com>

en/device-dev/driver/driver-platform-mmc-develop.md

@@ -52,7 +52,7 @@ struct MmcCntlrOps {
 | devReadOnly | **cntlr**: structure pointer to the MMC controller at the core layer.| Boolean value| Checks whether the device is read-only.| 
 | cardPluged | **cntlr**: structure pointer to the MMC controller at the core layer.| Boolean value| Checks whether the device is removed.| 
 | devBusy | **cntlr**: structure pointer to the MMC controller at the core layer.| Boolean value| Checks whether the device is being used.| 
-| tune | **cntlr**: structure pointer to the MMC controller at the core layer.<br>**cmdCode**: command code of the uint32_t type.| HDF_STATUS| Tunes the oscillator circuit frequency. |
+| tune | **cntlr**: structure pointer to the MMC controller at the core layer.<br>**cmdCode**: command code of the uint32_t type.| HDF_STATUS| Tunes the oscillator circuit frequency.| 
 | rescanSdioDev | **cntlr**: structure pointer to the MMC controller at the core layer.| HDF_STATUS| Scans and adds an SDIO device.| 
 
 
@@ -75,7 +75,6 @@ The MMC module adaptation involves the following steps:
       > For details about the functions in **MmcCntlrOps**, see [Available APIs](#available-apis).
 
 4. Debug the driver.
-   
    (Optional) For new drivers, verify the basic functions, for example, check the information returned after the **MmcCntlrOps** instance is attached and whether the device starts successfully.