Disable MIP filtering on D3D using maxLOD.

D3D12_FILTER cannot disable MIP mapping.

Change-Id: Ia2b1e731614a7832bfe8d25256a3e8c10ae36233
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/305279
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
3 files changed