bfin_can: rewrite the blackfin style of read/write to common ones

Replace the blackfin arch dependent style of bfin_read/bfin_write with
common readw/writew

Signed-off-by: Aaron Wu <Aaron.wu@analog.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
1 file changed