soc: ace_v1x: unmap entire unused virtual space
soc: ace_v1x: unmap entire unused virtual space

This patch corrects the initial unmapping of unused l2 memory
to unmap until the end of virtual address space instead
of unmapping until the end of l2 physical memory.

Signed-off-by: Jaroslaw Stelter <581b79714cd537797b59efe9f3073b03d647b252@intel.com>

finikorg/zephyr,galak/zephyr,finikorg/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr