i2c: octeon: Rename [read|write]_sw to reg_[read|write]

Rename the [read|write]_sw functions to make it clearer they access
the TWSI registers.

Signed-off-by: Jan Glauber <jglauber@cavium.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
1 file changed