i2c:i2c-bfin-twi: include twi head file

TWI bit mask macros are moved to twi head file.
Depend on commit 61c16b5c

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>