clk: tegra: dpaux and dpaux1 are fixed factor clocks

The dpaux (on Tegra124 and Tegra210) and dpaux1 (on Tegra210) are fixed
factor clocks (1:17) and derived from pll_p_out0 (pll_p). They also have
a gate bit in the peripheral clock registers.

Signed-off-by: Thierry Reding <treding@nvidia.com>