clk: hip04: add clock driver

Now only fixed rate clocks are appended into the clock driver.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>

diff --cc drivers/clk/Makefile
Simple merge

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

diff --cc drivers/clk/hisilicon/clk-hip04.c
Simple merge

diff --cc include/dt-bindings/clock/hip04-clock.h
Simple merge