ARM: exynos: dp: Remove 90ms bridge delay

ARM: exynos: dp: Remove 90ms bridge delay

Now that the DP driver supports hotplug interrupts, we can get rid of
the 90ms delay and let the DP driver handle any glitching that occurs
because of the bridge.

BUG=chrome-os-partner:10829
BUG=chrome-os-partner:11158
BUG=chrome-os-partner:12046
TEST=Tested on snow, screen came up on power-on and resume

Change-Id: Ieabeeaf81e4e657b91c7996a3ded73dc650eff99
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/29146
Reviewed-by: Olof Johansson <olofj@chromium.org>