Disable Provisioning for NOR Less Configurations

On NOR less configurations, persistent key object is not supported because the Secure SPI-NOR chip is not available on the board. Therefore, SPI-NOR provisioning must be disabled by setting the disable_snor_provisioning MB2 BCT flag to 1.

The MB2 BCT flag is at the following location:

drive-foundation/platform-config/hardware/nvidia/platform/<board>/common/bct/misc/tegra234-mb2-bct-auto-common.dtsi