Optimize k210 serial port driver for nuttx

Ubiquitous/Nuttx_Fusion_XiUOS/aiit_board/edu-riscv64/Kconfig

@@ -8,8 +8,8 @@ if ARCH_BOARD_EDU_RISCV64
 menuconfig BSP_USING_CH376
     bool "Using CH376 device"
     default n
-    select K210_16550_UART
-    select K210_16550_UART3
+    select K210_UART
+    select K210_UART3
     
 if BSP_USING_CH376
 
@@ -40,8 +40,8 @@ menuconfig BSP_USING_TOUCH
     default n
 
 menuconfig BSP_USING_CAN
-    select K210_16550_UART
-    select K210_16550_UART1
+    select K210_UART
+    select K210_UART1
     bool "Using CAN device"
     default n
 

Ubiquitous/Nuttx_Fusion_XiUOS/aiit_board/edu-riscv64/src/can_demo.c

@@ -40,7 +40,7 @@
 #include <fcntl.h>
 #include <termios.h>
 #include <nuttx/ioexpander/gpio.h>
-#include "k210_uart_16550.h"
+#include "k210_uart.h"
 #include "k210_fpioa.h"
 #include "k210_gpiohs.h"
 #include "k210_gpio_common.h"

Ubiquitous/Nuttx_Fusion_XiUOS/aiit_board/edu-riscv64/src/k210_bringup.c

@@ -95,7 +95,7 @@ int k210_bringup(void)
   board_touch_initialize();
 #endif
 
-#ifdef CONFIG_K210_16550_UART1
+#ifdef CONFIG_K210_UART1
 #ifdef CONFIG_ADAPTER_ESP8285_WIFI
   sysctl_clock_enable(SYSCTL_CLOCK_UART1);
   sysctl_reset(SYSCTL_RESET_UART1);
@@ -121,7 +121,7 @@ int k210_bringup(void)
 #endif
 #endif
 
-#ifdef CONFIG_K210_16550_UART2
+#ifdef CONFIG_K210_UART2
   sysctl_clock_enable(SYSCTL_CLOCK_UART2);
   sysctl_reset(SYSCTL_RESET_UART2);
 
@@ -129,7 +129,7 @@ int k210_bringup(void)
   fpioa_set_function(GPIO_EC200T_TXD, FPOA_USART2_TX);
 #endif
 
-#ifdef CONFIG_K210_16550_UART3
+#ifdef CONFIG_K210_UART3
   sysctl_clock_enable(SYSCTL_CLOCK_UART3);
   sysctl_reset(SYSCTL_RESET_UART3);
   

Ubiquitous/Nuttx_Fusion_XiUOS/aiit_board/edu-riscv64/src/k210_ch376.h

@@ -36,7 +36,7 @@
 #include <assert.h>
 #include <fcntl.h>
 #include <nuttx/ioexpander/gpio.h>
-#include "k210_uart_16550.h"
+#include "k210_uart.h"
 
 #define ERR_USB_UNKNOWN  0xFA