[bsp/rt-spark] fix spi_flash_init.c

bsp/stm32/stm32f407-rt-spark/board/ports/spi_flash_init.c

@@ -18,7 +18,7 @@
 static int rt_hw_spi_flash_init(void)
 {
     __HAL_RCC_GPIOB_CLK_ENABLE();
-    rt_hw_spi_device_attach("spi2", "spi20", GPIOB, GPIO_PIN_12);
+    rt_hw_spi_device_attach("spi2", "spi20", GET_PIN(B, 12));
 
     if (RT_NULL == rt_sfud_flash_probe("W25Q64", "spi20"))
     {