drm: Use helper to turn off CRTC
Lukas Wunner authored

Use shiny new drm_crtc_force_disable() instead of open coding the same.
No functional change intended.
Signed-off-by: default avatarLukas Wunner <lukas@wunner.de>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/fce52e55fa5a3a2c1436205d26fc1cec70d01eea.1465392124.git.lukas@wunner.de
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