fix raspi spi access of mode constants (was missing a "self")

Found this while testing the MAX31865.

diff --git a/src/adafruit_blinka/microcontroller/raspi_23/spi.py b/src/adafruit_blinka/microcontroller/raspi_23/spi.py
index a4e1158a6f79bce68c55131cd04dddb9c70d9b64..b90587316536e105499e17d317a2073079b7fb18 100755 (executable)
--- a/src/adafruit_blinka/microcontroller/raspi_23/spi.py
+++ b/src/adafruit_blinka/microcontroller/raspi_23/spi.py
@@ -19,9 +19,9 @@ class SPI:
                   firstbit=MSB, sck=None, mosi=None, miso=None):
         mode = 0
         if polarity:
-            mode |= CPOL
+            mode |= self.CPOL
         if phase:
-            mode |= CPHA
+            mode |= self.CPHA
 
         self.clock_pin = sck
         self.mosi_pin = mosi