drm/amd/amdgpu: update jpeg 5 capability

Based on the documentation the maximum resolustion should
be 16384x16384.

Signed-off-by: David (Ming Qiang) Wu <David.Wu3@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>