msm/sde/rotator: update rotator max clk rate based on target

This change updates max clock rate for rotator based
on target check instead of pre-defined maximum clk rate.

Change-Id: I3523262a7dbe652156c7832dcfc9b5a1e216288e
Signed-off-by: Yashwanth <yvulapu@codeaurora.org>