Revert "drivers: clk: zynqmp: update divider round rate logic"

This reverts commit 9117fc44 which is
commit 1fe15be1 upstream.

It is reported to cause regressions in the 5.15.y tree, so revert it for
now.

Link: https://www.spinics.net/lists/kernel/msg5397998.html


Signed-off-by: Joel Guittet <jguittet.opensource@witekio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>