mmc: wmt-sdmmc: 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 v5.15.86 by commit 58c3a8d0f1abeb1ca5c2df948be58ad4f7bb6f67, it was introduced in version v3.8 by commit 3a96dff0f828ae9dfb43efd49a9b67a74c6dc360. For more details please see the references link.