update en/device-dev/driver/driver-platform-uart-develop.md.

Signed-off-by: Nking_he <6384784@qq.com>

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

@@ -178,10 +178,7 @@ The UART module adaptation involves the following steps:
     -   Initialize **UartHost**.
     -   Instantiate **UartHostMethod** in the **UartHost** object.
 
-        >![](../public_sys-resources/icon-note.gif) **NOTE** 
-
-        >For details, see [Available APIs](#available-apis).
-
+        For details, see [Available APIs](#available-apis).
       
 4.  Debug the driver.
     -   \(Optional\) For new drivers, verify the basic functions, such as the UART control status and response to interrupts.
@@ -314,7 +311,7 @@ The following uses  **uart\_hi35xx.c**  as an example to present the contents th
         #define UART_FLG_RD_BLOCK     (1 << 2)
             RecvNotify recv; // Pointer to the function that receives serial port data
             struct UartOps *ops; // Custom function pointer structure. For details, see device/hisilicon/drivers/uart/uart_pl011.c.
-            void *private; // It stores the pointer to the start address of UartPl011Port for easy invocation.
+            void *private; // Pointer to the start address of UartPl011Port for easy invocation
         };
         
         // UartHost is the controller structure at the core layer. Its members are assigned with values by using the Init function.
@@ -545,6 +542,3 @@ The following uses  **uart\_hi35xx.c**  as an example to present the contents th
             host->priv = NULL;
         }
         ```
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-
-