Yes, you can just restore your NAND with only those but if the firmware version is much lower of your boot0/boot1 + eMMC SYS than your current firmware version, then you will need to initialize the system which means you will lose all installed content and save data. You can perform a system initialization in the Maintenance Menu which you enter by holding both volume + and - when turning on the console or using a payload that boots CFW/OFW. Be sure to backup your save data before performing the restore.