i2c: arb: gpio-challenge: stop double error reporting

i2c_mux_add_adapter already logs a message on failure.

Reviewed-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Peter Rosin <peda@axentia.se>
This commit is contained in:
Peter Rosin 2017-04-03 10:14:06 +02:00
commit 1144d13eaa