Disabling IOMMU in Jetson Orin Dev Kit (64GB)

Orin Dev kit, failed to boot if NIC card connected.

Unable to see kernel logs. It was working with Jetpack (r35.2.1)

Once I move to Jetback r36.2 ( GDS is working after r35.4.1)

dev kit failed to boot.

Per below thread looks like, have to disable IOMMU in Device Tree (DT).

Q1] Whats the correct DT use for the dev kit to make changes ?

On Device I see DTB -/boot/dtb/kernel_tegra234-p3737-0000+p3701-0005-nv.dtb of size 242KB

The one getting build for me as size half of the one on device.

-rw-rw-r-- 1 xyz xyz 123K Jan 17 22:43 tegra234-p3737-0000+p3701-0000.dtb

Q2] How to generate DT of same size locally ?

Any pointers to both questions.