FROMGIT: drm/amd/display: Enable DFS bypass support in DC config

[Why]

We explicitly disable DFS bypass support when creating DC. Support
for this feature should now be in place so it can be left implicitly
enabled.

[How]

Remove the line that disables DFS bypass support.

Note: This option was actually reset to false anyway for most of
the hardware I've tested on making this particular line misleading
in the first place. This patch also fixes this issue.

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

(cherry picked from commit 1c8faa9a
    git://anongit.freedesktop.org/drm/drm of origin/drm-next branch)

    BUG=b:117659336
    TEST=Build & Boot on Careena

Change-Id: I53d52f1660781d443a3ef0cbbd01e27f58fb2fe1
Reviewed-on: https://chromium-review.googlesource.com/1294550


Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Hang Zhou <hang.zhou@amd.corp-partner.google.com>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>