Driver needs to set esync clock's parent under a gating condition,
which is not available at the point where the clocks under MDSS DSI
node are parsed. Moves the esync RCG clock to SDE DSI instead.
Change-Id: I01e0fedbc7620425d237024663da944e2f7ae9cf
Signed-off-by: Kirill Shpin <quic_kshpin@quicinc.com>