trs.conf: update from kernel 6.1 to 6.4

Mikko Rapelirequested to merge
update_kernel into main

poky defaults currently to quite stable 6.1 kernel but also provides latest stable kernel recipe which may not be working so well. Move closer to bleeding edge kernels by using the latest available recipe in poky to help iron out issues with the latest kernels.

Signed-off-by: Mikko Rapeli mikko.rapeli@linaro.org

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