clk: tegra: Share clk and rst register defines with Tegra clock driver

Move CLK_OUT_ENB and RST_DEVICES registers to clk.h to share these with
Tegra clock driver.

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