clk: Add clock driver for Amlogic A1

This patch adds basic clock driver for Amlogic A1 Family which supports
enabling/disabling some gates, getting frequencies and setting rate
with limited reparenting.

Signed-off-by: Igor Prusov <ivprusov@salutedevices.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Link: https://lore.kernel.org/r/20230925155209.130671-3-ivprusov@salutedevices.com


Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>