ARM: dts: allwinner: Remove accidental suniv duplicates

Allwinner suniv boards' DT files were accidentally duplicated
in the Makefile when they were moved to the new directory
structure. Remove these duplicates for code cleanness.

Fixes: 724ba675 ("ARM: dts: Move .dts files to vendor sub-directories")
Signed-off-by: Csókás, Bence <csokas.bence@prolan.hu>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Link: https://patch.msgid.link/20241104230628.3736186-1-csokas.bence@prolan.hu


Signed-off-by: Chen-Yu Tsai <wens@csie.org>