Add display cesta related DT node and configs on sun target.
Move the GDSC & MDP core clk from mdp to cesta node, as it will
be controlled through cesta. Add the cesta related register
offsets in trusted-vm DT for incoming io validation during the
transition.
Change-Id: I1f5ebf59db2169dfae3801f572c80af9e016e667
Signed-off-by: Veera Sundaram Sankaran <quic_veeras@quicinc.com>