devices: gpu: use render optimized buffers
devices: gpu: use render optimized buffers

Using non-linear buffer seems to be safe based on the apps I've
tested. This is similiar to the ARC++ use case, which also doesn't
explicitly send modifiers to Chrome.

BUG=chromium:945033
TEST=clear_clear goes from 980 mpixels --> 6797.90 mpixels
     on Nami

Change-Id: I2dcb78366c2d2d83d64bb23f6da1f07c8747819c
Reviewed-on: https://chromium-review.googlesource.com/1538463
Commit-Ready: Gurchetan Singh <99434bba058e25b6203b8ae055a4f697dad0ef64@chromium.org>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
Reviewed-by: David Riley <a1c52a99f156ff41f0ea478f29291144551a02f6@chromium.org>
Reviewed-by: Chia-I Wu <fdb43c5ef76ecda0c1661d6d199b5bfac1db538a@google.com>
Reviewed-by: Stéphane Marchesin <e16f69845633a0cf74affe1e5a677caa6296c937@chromium.org>

google/crosvm,google/crosvm,google/crosvm,google/crosvm