ARM: tegra: Whitespace clean-up for Tegra20/30/124

There were a few cases of eight spaces being used instead of a tab
character plus one case of using two spaces after an equal sign instead
of just one which this patch fixes.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>