mmc: rtsxusbsdmmc: 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 7fa922c7a3dd623fd59f1af50e8896fd9ca7f654, it was introduced in version v3.16 by commit 1d14310abb74011dc5523baf0aee75b94070861a. For more details please see the references link.