drm/amdgpu: Replace Mutex with Spinlock for RLCG register access to avoid Priority Inversion in SRIOV

🔗 CVE IDs covered (1)

🎯 Affected products6

• azl3 kernel 6.6.104.2-4 on Azure Linux 3.0
• azl3 kernel 6.6.112.1-2 on Azure Linux 3.0
• azl3 kernel 6.6.117.1-1 on Azure Linux 3.0
• azl3 kernel 6.6.119.3-1 on Azure Linux 3.0
• azl3 kernel 6.6.119.3-3 on Azure Linux 3.0
• azl3 kernel 6.6.121.1-1 on Azure Linux 3.0

🔗 References (1)

• advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-38104