In axp_init after checking the chip ID there is an else clause that
returns ret. ret is guaranteed to be 0 at this point as the code would
have returned above if not. The next statement is a return 0 so the
return ret is redundant, remove it.
This issue was found by Smatch.
Signed-off-by: Andrew Goodbody <andrew.goodbody@linaro.org> Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>