fix(intel): update boot scratch cold register to use cold 8

Boot scratch cold 8 register is fully used by n5x.
Update to use boot scratch cold 8 bit 19 register for cpu0 ON/OFF
indicator.

Change-Id: I45ebfdcc17c47bcce69f5f611e677ac7838ecf52
Signed-off-by: Jit Loon Lim <jit.loon.lim@intel.com>
1 file changed