This finishes up the handling of `D3DX10_IMAGE_LOAD_INFO` fields. :)
The default filter values were confirmed using a test locally that I've pushed to a branch here: https://gitlab.winehq.org/cmcadams/wine/-/commits/d3dx10-filter-test
-- v3: d3dx10: Pass D3DX10_IMAGE_LOAD_INFO texture creation arguments through in load_texture_data(). d3dx10: Handle FirstMipLevel argument in load_texture_data(). d3dx10: Add support for generating mipmaps to load_texture_data().