Bricked Netgear M4300-52G (GSM4352S) via "Erase Permanent Storage" from CLI

I had the same problem and stumbled upon this thread.  I had luck recovering from the same state by following the steps in my post here:

https://community.netgear.com/t5/Managed-Switches/Recover-from-uboot-interface-on-M4300-52G-GSM4352S/td-p/2368758

My method did require a TFTP server, but theoretically the other methods to transfer files should work too.  I think my biggest hurdle was figuring out the proper load address which I finally got by printing the environment before issuing other commands.  That got me to the operational code utility and then doing a "Load Code Update Package" restored the switch to an operational state for me.