Merge tag 'exynos-drm-fixes-for-v4.20-rc2' of git://git.kernel.org/pub/scm/linux...

Merge tag 'exynos-drm-fixes-for-v4.20-rc2' of git://git./linux/kernel/git/daeinki/drm-exynos into drm-fixes

Three regressions
- Revert frame counter support
  . This patch fixes a issue which doesn't work extension and clone
    mode because some CRTC devices don't provide frame counter value
    properly.
- Fix lack of fbdev on Rinato and trats boards.
  . This patch considers for connector to be registered by DSI after
    DRM device is registered, and also it makes fbdev initializaion
    to be done even if no connector at the moment.
- Check for dsi->panel object correctly
  . This patch fixes checking for dsi->panel. of_drm_find_panel
    function returns panel object or error value so error value
    should be checked using IS_ERR macro.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Inki Dae <inki.dae@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1541407733-7632-1-git-send-email-inki.dae@samsung.com