According to comments in code and common sense, cclk_lp uses its
own divisor, not cclk_g's.

Fixes: b08e8c0e ("clk: tegra: add clock support for Tegra30")
Signed-off-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Acked-By: NPeter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>