fix: SPI creation failed

Signed-off-by: lbuque <1102390310@qq.com>

Author: lbuque

examples/tft_config/t-display/tft_config.py

@@ -2,7 +2,7 @@
 import lcd
 
 def config():
-    hspi = SPI(2, baudrate=40000000, sck=Pin(18), mosi=Pin(19), miso=None)
+    hspi = SPI(2, sck=Pin(18), mosi=Pin(19), miso=None)
     panel = lcd.SPIPanel(spi=hspi, command=Pin(16), cs=Pin(5), pclk=60000000, width=135, height=240)
     st = lcd.ST7789(panel, reset=Pin(23), backlight=Pin(4))
     st.backlight_on()