clk: amlogic: gxbb: drop non existing 32k clock parent

clk: amlogic: gxbb: drop non existing 32k clock parent

The 32k clock reference a parent 'cts_slow_oscin' with a fixme note saying
that this clock should be provided by AO controller.

The HW probably has this clock but it does not exist at the moment in
any controller implementation. Furthermore, referencing clock by the global
name should be avoided whenever possible.

There is no reason to keep this hack around, at least for now.

Fixes: 14c735c8e308 ("clk: meson-gxbb: Add EE 32K Clock for CEC")
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20241220-amlogic-clk-gxbb-32k-fixes-v1-2-baca56ecf2db@baylibre.com
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>