mmc: alcor: fix return value check of mmcaddhost()
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 v5.10.163 by commit 4a6e5d0222804a3eaf2ea4cf893f412e7cf98cb2, it was introduced in version v5.0 by commit c5413ad815a675b5c98a002353d8e96b44b164e9. For more details please see the references link.