MLK-17537-1: drm/bridge: Correct the ADV7533 init

MLK-17537-1: drm/bridge: Correct the ADV7533 init

According to the Analog Devices configuration script, there are some
steps that need to be made when configuring the ADV for a specific mode.
Some of those steps were missing from driver, so this patch takes care
of this.
Also, in mode_fixup, the driver is trying to reconfigure the DSI lanes
from 4 to 3, when pixel clock is lower than 80MHz, which is not
necessary. the lanes property represents the maximum available lanes on
that devices and should not differ from a mode to another.
The DSI host is the one who should predict how many lanes it could use
to drive a display mode, so remove this from ADV driver.

Signed-off-by: Robert Chiras <robert.chiras@nxp.com>
Reviewed-by: Laurentiu Palcu <laurentiu.palcu@nxp.com>