drm-misc-fixes-2021-02-10

Thomas Zimmermann

@tzimmermann

1926a050 · drm/sun4i: dw-hdmi: Fix max. frequency for H6 · Feb 10, 2021

 * dp_mst: Don't report un-attached ports as connected
 * sun4i: tcon1 sync polarity fix; Always set HDMI clock rate; Fix
          H6 HDMI PHY config; Fix H6 max frequency
 * vc4: Fix buffer overflow
 * xlnx: Fix memory leak