ARM: dts: exynos: white-space cleanups

Fixups some white-space issues.  Checkpatch reported:

  WARNING: Block comments should align the * on each line
  WARNING: please, no spaces at the start of a line
  ERROR: code indent should use tabs where possible

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210315124313.114842-2-krzysztof.kozlowski@canonical.com