msm: mdss: fix clk_init and panel_cfg sequence in ctrl_probe

Currently, there is a circular dependency between clk init and
panel_cfg. This is due to the shadow_clk init in clk_init which
depends on dyn_fps, a panel specific parameter and refresh_clk
in panel_cfg which tries to refresh the clks before the clks are
initialized. Decouple the dependencies and fix the sequence to
avoid unnecessary error logs.

Change-Id: Icbcd1030b7f72e5e551be864b667e97c938500d0
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>