Revert "Round up DMSAA attachments to pow2 if supported."

This reverts commit c3e8a7eeb69a8e294cbf782a17d2b906429de819.

Reason for revert: breaks dmsaa clip_shader_persp and complexclip4_aa

Original change's description:
> Round up DMSAA attachments to pow2 if supported.
>
> Change-Id: I03f5ea649209b9894753c981872edbd7d718288c
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/408643
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Greg Daniel <egdaniel@google.com>

TBR=egdaniel@google.com,bsalomon@google.com,csmartdalton@google.com

Change-Id: I3ff0931d7d00b064b5721a2593d2e9865e8edebc
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/408896
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
7 files changed