CVE-2024-49914 drm/amd/display: Add null check for pipe_ctx->plane_state in dcn20_program_pipe

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add null check for pipectx-planestate in dcn20programpipe This commit addresses a null pointer dereference issue in the dcn20programpipe function. The issue could occur when pipectx-planestate is null. The fix ad...