UPSTREAM: drm/virtio: Replace IDRs with IDAs

These IDRs were only being used to allocate unique numbers, not to look
up pointers, so they can use the more space-efficient IDA instead.

Signed-off-by: Matthew Wilcox <willy@infradead.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20180926160031.15721-2-willy@infradead.org



[ kraxel: resolve conflict ]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit 1938d1ae32fefa172288e3a9245ae126640c5c10)
Signed-off-by: Greg Hartman <ghartman@google.com>
BUG: 139386237
Change-Id: Ie7a81e0eedc7adf6ae7f4d75a0b7fa2533fae577