MLK-16183 drm/bridge: it6263: Workaround cable detection failure at boot time

There is cable detection failure issue on i.MX8qxp arm2 platform
at boot time when we avoid imx-drm deferral probe entirely(i2c
bus driver probe needs to be before the it6263 driver probe).
The workaround is to read the cable detection status multiple
times.  Based on experiments, it looks reading for 40 times works.

Signed-off-by: Liu Ying <victor.liu@nxp.com>
(cherry picked from commit fb719c95)