clk: core: Force setting the phase delay when no change

This patch reverts commit 023bd716 ("clk: skip unnecessary
set_phase if nothing to do"), fixing two problems:

* in some SoCs, the hardware phase delay depends on the rate ratio of
  the clock and its parent. So, changing this ratio may imply to set
  new hardware values, even if the logical delay is the same.

* when the delay was the same as previously, an error was returned.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Fixes: 023bd716 ("clk: skip unnecessary set_phase if nothing to do")
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>