ARM: dts: sun[47]i: Fix display backend 1 output to TCON0 remote endpoint

There is a copy-paste error in the display pipeline device tree graph.
The remote endpoint of the display backend 1's output to TCON0 points
to the wrong endpoint. This will result in the driver incorrectly
parsing the relationship of the components.

Reported-by: Andrea Venturi <ennesimamail.av@gmail.com>
Fixes: 0df4cf33 ("ARM: dts: sun4i: Add device nodes for display
		      pipelines")
Fixes: 5b92b29b

 ("ARM: dts: sun7i: Add device nodes for display
		      pipelines")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>