ARM: dts: sun7i: bananapi-m1-plus: Reindent whole file using tabs

The bananapi-m1-plus dts file was indented using 4 spaces, without
tabs. This does not match the code style.

Reindent the whole file before we do anything else.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>