boards: Revert "boards: acrn_ehl_crb: Add ibecc DTS node"
boards: Revert "boards: acrn_ehl_crb: Add ibecc DTS node"

This reverts commit 445a23a167c027bef3468d9e77556a363ed2dd07.

This change was made with the incorrect assumption that using IBECC in
an ACRN VM is a valid use case. Turns out that ACRN will always manage
the IBECC access itself and the Zephyr driver is only useful for running
natively on the hardware.

Signed-off-by: Johan Hedberg <628991c7b0a19c384f9b99c21ec330ce952bb838@intel.com>

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