kernel: drm/radeon: fix UBSAN warning in kv_dpm.c

A vulnerability was found in the Linux kernel's DRM/Radeon driver, specifically in the sumovidmappingentry within the kvdpm.c file. Insufficient bounds checking can lead to memory corruption...

UBUNTU-CVE-2024-40987

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix UBSAN warning in kvdpm.c Adds bounds check for sumovidmappingentry...