ozone: Allocate scanout buffers according to KMS modifiers.

ozone: Allocate scanout buffers according to KMS modifiers.

KMS now advertises per plane buffer modifiers.
This patch uses that information to make an educated choice on which
modifiers to use when allocating scanout buffers for a specific crtcs.

patch from issue 2576263002 at patchset 60001 (http://crrev.com/2576263002#ps60001)
BUG=680510, chrome-os-partner:56407
Review-Url: https://codereview.chromium.org/2623963002
Cr-Commit-Position: refs/heads/master@{#442979}
(cherry picked from commit f7f9a427b0d22429efb3cb62ff7d4f55f6f5176f)

Review-Url: https://codereview.chromium.org/2627193003 .
Cr-Commit-Position: refs/branch-heads/2924@{#751}
Cr-Branched-From: 3a87aecc31cd1ffe751dd72c04e5a96a1fc8108a-refs/heads/master@{#433059}
Committed: https://chromium.googlesource.com/chromium/src/+/18409015d6296cc33dfedcf1cb8ec70a5295c78d

[Daniele Castagna, 2017-01-13 00:20:04]

Description was changed from

==========
ozone: Allocate scanout buffers according to KMS modifiers.

KMS now advertises per plane buffer modifiers.
This patch uses that information to make an educated choice on which
modifiers to use when allocating scanout buffers for a specific crtcs.

patch from issue 2576263002 at patchset 60001
(http://crrev.com/2576263002#ps60001)
BUG=680510,chrome-os-partner:56407

Review-Url: https://codereview.chromium.org/2623963002
Cr-Commit-Position: refs/heads/master@{#442979}
(cherry picked from commit f7f9a427b0d22429efb3cb62ff7d4f55f6f5176f)
==========

to

==========
ozone: Allocate scanout buffers according to KMS modifiers.

KMS now advertises per plane buffer modifiers.
This patch uses that information to make an educated choice on which
modifiers to use when allocating scanout buffers for a specific crtcs.

patch from issue 2576263002 at patchset 60001
(http://crrev.com/2576263002#ps60001)
BUG=680510,chrome-os-partner:56407

Review-Url: https://codereview.chromium.org/2623963002
Cr-Commit-Position: refs/heads/master@{#442979}
(cherry picked from commit f7f9a427b0d22429efb3cb62ff7d4f55f6f5176f)

Review-Url: https://codereview.chromium.org/2627193003 .
Cr-Commit-Position: refs/branch-heads/2924@{#751}
Cr-Branched-From:
3a87aecc31cd1ffe751dd72c04e5a96a1fc8108a-refs/heads/master@{#433059}
Committed:
https://chromium.googlesource.com/chromium/src/+/18409015d6296cc33dfedcf1cb8e...
==========

[Daniele Castagna, 2017-01-13 00:20:06]

Committed patchset #1 (id:1) manually as
18409015d6296cc33dfedcf1cb8ec70a5295c78d.