[bsp][cvitek] fix spi driver build error

Build error: 'struct _device_spi' has no member named 'base_addr'

Analyze: the name should be dws.regs

Solution: change base_addr to dws.regs

Signed-off-by: zdtyuiop4444 <ign7798540@gmail.com>

bsp/cvitek/drivers/drv_spi.c

@@ -335,7 +335,7 @@ int rt_hw_spi_init(void)
 
     for (rt_size_t i = 0; i < sizeof(_spi_obj) / sizeof(struct _device_spi); i++)
     {
-        _spi_obj[i].base_addr = (rt_ubase_t)DRV_IOREMAP((void *)_spi_obj[i].base_addr, 0x1000);
+        _spi_obj[i].dws.regs = (rt_ubase_t)DRV_IOREMAP((void *)_spi_obj[i].dws.regs, 0x1000);
 
         _spi_obj[i].spi_bus.parent.user_data = (void *)&_spi_obj[i];
         ret = rt_spi_bus_register(&_spi_obj[i].spi_bus, _spi_obj[i].device_name, &_spi_ops);