drivers: mediatek: Fix error handling in mtk_i2c_do_transfer

Errors were handled only if an I2C transfer timed out
and received a NACK which is very unlikely. This commit
changes the condition such that errors are handled if
an I2C transfer times out or received a NACK.

Signed-off-by: Francois Berder <fberder@outlook.fr>
Reviewed-by: Heiko Schocher <hs@denx.de>
1 file changed