Two nested while loops are not necessary here, so integrate the read,
i2c_fsm and i2c_do_action calls into mv64xxx_i2c_wait_for_completion()
and remove the obsolete interrupt remains.
Signed-off-by: Bastian Stender <bst@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>