Revert "imx: set CPU boot entry for partition reboot"

This reverts commit d4a0970cfea5f0dd6f88a5c202b90ce31e6baecc.

SCFW already supported OCRAM retention, so no need to change
primary CPU's entry.

(cherry picked from commit 669492786bbb397252308d0005625176382caff3)
2 files changed