kernel: drm/amd/display: Implement bounds check for stream encoder creation in DCN301

A vulnerability was found in the DRM/AMD/Display module of the Linux Kernel. An out-of-bounds access exists in the 'streamencregs' array within DCN301, while accessing the array with 'engid,’ could lead to an out-of-bounds access beyond its four-element size, which can cause a system crash...