Documentation/amdgpu: Clarify MI200 and MI300 entries

Documentation/amdgpu: Clarify MI200 and MI300 entries

Add "Series" to MI200 and MI300 to clarify that they represent the
series of cards, and to more closely match the product information
materials. This also matches other entries in this list

Also correct a typo in the MI300 codename (Vangaram->Vanjaram)

Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>