Fix the following checkpatch warnings.

  WARNING: Missing a blank line after declarations
  WARNING: Prefer kcalloc over kzalloc with multiply
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Mark Brown <broonie@kernel.org>