blackfin: rename bfin-twi_i2c driver to adi_i2c

Signed-off-by: Scott Jiang <scott.jiang.linux@gmail.com>
diff --git a/include/configs/bf537-pnav.h b/include/configs/bf537-pnav.h
index ba74a69..6c9a907 100644
--- a/include/configs/bf537-pnav.h
+++ b/include/configs/bf537-pnav.h
@@ -142,7 +142,7 @@
 /*
  * I2C settings
  */
-#define CONFIG_BFIN_TWI_I2C	1
+#define CONFIG_SYS_I2C_ADI
 #define CONFIG_HARD_I2C		1