MLK-18297 drm/bridge: it6263: Sleep between status reads in connector detect

MLK-18297 drm/bridge: it6263: Sleep between status reads in connector detect

There are some issues with the HDMI connection on it6263 being slow to
come up. There is a hack there which reads the register multiple times
but it doesn't seem to be sufficient. This is particularly a problem
when inside a xen guest.

Improve this workaround by reading the status multiple times every few
5-10ms and returning connector_status_connected if any of those reads
sees HPDETECT.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
(cherry picked from commit 699ccad27c5476746e0b2c5da25c5a98e6ffab3f)