Mark dispcc clock node as GenPD provider and disable the display GDSC
regulator nodes for kera platform.
While at it, keep the gdsc's as it is on kera-rumi platform and update
the compatible to align with freq plan.
Change-Id: If01f876b3d160cf5c1cfe6be13e3e4b42f62cfa6
Signed-off-by: Anaadi Mishra <quic_anaadim@quicinc.com>