blackfin: rename bfin-twi_i2c driver to adi_i2c

The ADI twi peripheral is not binding to Blackfin processor only.
Change to a generic name.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
diff --git a/arch/blackfin/include/asm/twi.h b/arch/blackfin/include/asm/twi.h
new file mode 100644
index 0000000..922cdbd
--- /dev/null
+++ b/arch/blackfin/include/asm/twi.h
@@ -0,0 +1,15 @@
+/*
+ * i2c.c - driver for Blackfin on-chip TWI/I2C
+ *
+ * Copyright (c) 2006-2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __ARCH_TWI_H
+#define __ARCH_TWI_H
+
+#include <asm/blackfin.h>
+#include <asm/mach-common/bits/twi.h>
+
+#endif