freedreno/a7xx: Fix base_align for non-UBWC depth-stencil
What does this MR do and why?
A7XX appears to require alignment of 4096 for DS in both UBWC and non-UBWC cases.
Fixes rendering with TU_DEBUG=noubwc
In !27506 (comment 2293928) I talked about corruption of DS in non-UBWC case, so the real cause was this alignment issue.
This also changes alignment for a6xx, but since this affects only DS images, which generally aren't small - I think it's fine.