i2c: acorn: remove outdated path from file header

That path has gone away for a long time. Move the HW name upwards for a
proper header.
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/i2c-acorn.c

 /*
- *  linux/drivers/acorn/char/i2c.c
+ *  ARM IOC/IOMD i2c driver.
  *
  *  Copyright (C) 2000 Russell King
  *
@@ -7,8 +7,6 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
- *  ARM IOC/IOMD i2c driver.
- *
  *  On Acorn machines, the following i2c devices are on the bus:
  *	- PCF8583 real time clock & static RAM
  */