i2c: robotfuzz-osif: drop pointless test

In the for-loop test, ret will be either 0 or 1. So, the
comparison is pointless. Drop it, and drop the initializer
which is then also pointless.

Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>