bsp: ls2k: initial clk driver
#define UART0_BASE CKSEG1ADDR(UART0_BASE_ADDR + UART0_OFF)
#define GPIO_BASE 0xFFFFFFFFBFE10500
+#define PLL_SYS_BASE 0xFFFFFFFFBFE10480
void rt_hw_timer_handler(void);
void rt_hw_uart_init(void);
