CVE-2024-58072 wifi: rtlwifi: remove unused check_buddy_priv

In the Linux kernel, the following vulnerability has been resolved: wifi: rtlwifi: remove unused checkbuddypriv Commit 2461c7d60f9f "rtlwifi: Update header file" introduced a global list of private data structures. Later on, commit 26634c4b1868 "rtlwifi Modify existing bits to match vendor versio...