Revert "clk: meson: clean-up clock registration"

This reverts commit c8e4f840.

This patch was not initially a fix and is dependent on other
changes which are not fixes eithers.

With this change, multiple Amlogic based boards fails to boot,
as reported by kernelci.

Cc: stable@vger.kernel.org # 4.19.34
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>