iot boards have always defined their own aliases and with the base-board
defining it's own aliases, there are no pending boards depending on
common aliases defined in SoC level.

aliases are meant to be defined appropriately based on the exposed
interfaces at a board level, drop the aliases defined at SoC level.
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Kamlesh Gurudasani <kamlesh@ti.com>
Link: https://lore.kernel.org/r/20230419225913.663448-8-nm@ti.comSigned-off-by: Vignesh Raghavendra <vigneshr@ti.com>