clk: tegra: move PMC, fixed clocks to common files

Introduce new files for fixed and PMC clocks common between several Tegra
SoCs and move Tegra114 to this new infrastructure.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>

diff --cc drivers/clk/tegra/Makefile
Simple merge

diff --cc drivers/clk/tegra/clk-tegra-fixed.c
Simple merge

diff --cc drivers/clk/tegra/clk-tegra-pmc.c
Simple merge

diff --cc drivers/clk/tegra/clk-tegra114.c
Simple merge

diff --cc drivers/clk/tegra/clk.h
Simple merge