Revert "OMAP4: DPLL cascading: hold DPLL cascading constraint before warm reset"

This reverts commit effa7fbff1abfea9be9d2aa886a794c1f3aefe69.
Exiting from DPLL cascading on system restart should be done before CPUs are turned off.

Change-Id: I9e8bdc777daee71bf3c5963a3b95fb627153f13b
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
Signed-off-by: Andrii Tseglytskyi <andrii.tseglytskyi@ti.com>
Signed-off-by: Volodymyr Mieshkov <volodymyr.mieshkov@ti.com>