w1: fix WARNING after calling w1_process()
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.19.272 by commit bccd6df4c177b1ad766f16565ccc298653d027d0, it was introduced in version v2.6.28 by commit 3c52e4e627896b42152cc6ff98216c302932227e. For more details please see the references link.