Add initial version of Infineon CAT1 clock control driver.
- supports clock initialization based on board DT configuration.
Added initial version of system_clocks.dtsi for Infineon PSoC 6 SOC.
Includes: clk_imo, path_mux0..4, fll0, pll0, clk_hf0..4, clk_fast,
clk_slow and clk_peri.
Signed-off-by: Nazar Palamar <nazar.palamar@infineon.com>
