arm64: dts: meson: vim3: whitespace fixups

Spaces have been used to indent 2 nodes.
Replace those with tabs and remove one extra newline

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20201207095346.26297-2-jbrunet@baylibre.com