Hi Aditya,
Have you already burned the eFuses? You could test the NOR boot overriding the eFuses with the external GPIOs boot switches (of the Demo board), like the explanation of section 4.5 “How to boot the i.MX boards” of the “i.MX Linux® User's Guide” document included on L4.1.15_2.0.0_LINUX_DOCS package (attached).
Hope this will be useful for you.
Best regards!
/Carlos
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