blackfin: rename bfin-twi_i2c driver to adi_i2c

Signed-off-by: Scott Jiang <scott.jiang.linux@gmail.com>
diff --git a/include/configs/pr1.h b/include/configs/pr1.h
index 0f57e86..eb18d6d 100644
--- a/include/configs/pr1.h
+++ b/include/configs/pr1.h
@@ -102,7 +102,7 @@
 /*
  * I2C Settings
  */
-#define CONFIG_BFIN_TWI_I2C
+#define CONFIG_SYS_I2C_ADI
 #define CONFIG_HARD_I2C