blackfin: rename bfin-twi_i2c driver to adi_i2c

Signed-off-by: Scott Jiang <scott.jiang.linux@gmail.com>
diff --git a/include/configs/cm-bf537e.h b/include/configs/cm-bf537e.h
index 1729b44..85f5341 100644
--- a/include/configs/cm-bf537e.h
+++ b/include/configs/cm-bf537e.h
@@ -122,7 +122,7 @@
 /*
  * I2C Settings
  */
-#define CONFIG_BFIN_TWI_I2C	1
+#define CONFIG_SYS_I2C_ADI
 #define CONFIG_HARD_I2C		1