To update anyone who comes across this issue...
Yes, a stripped version of the dts, like above, is all that is necessary to see console output. You just have to setup your uart pads correctly in imx53.dtsi.
My main issue was the uart setting in .config.
I had earlyprintk turned on and the uart port number is one based. It defaulted to port 1 while ours is port 2 (mxc1).
This zero based/one based inconsistency has bit me more than once. ;-)
Initially I thought it was a machine type mismatch, but that proved to be wrong.
As a matter of fact I stripped all machine type references from u-boot and kernel and it works fine.
My question is: Is it ok to remove machine type when using a newer version of u-boot and linux?
The dtb has a model description, but no other handshake to validate the system between u-boot and linux.
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