clk: amlogic: use probe helper in mmio based controllers

clk: amlogic: use probe helper in mmio based controllers

Factorize the probe function of the mmio based amlogic clock controllers
using the newly introduced probe helper. This removes a fair amount
of duplicated code.

Reviewed-by: Chuan Liu <chuan.liu@amlogic.com>
Link: https://lore.kernel.org/r/20250825-meson-clk-cleanup-24-v2-3-0f402f01e117@baylibre.com
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>