clk: amlogic: naming consistency alignment

Amlogic clock controller drivers are all doing the same thing, more or
less. Yet, over the years, tiny (and often pointless) differences have
emerged.

This makes reviews more difficult, allows some errors to slip through and
make it more difficult to exploit SoC commonalities, leading to code
duplication.

This change enforce, wherever possible, a consistent and predictable scheme
when it comes to code organisation and naming, The scheme chosen is what
was used the most already, to try and minimise the size of the ugly
resulting diff. Here are some of the rules applied:
- Aligning clock names, variable names and IDs.
  - ID cannot change (used in DT)
  - Variable names w/ SoC name prefixes
  - Clock names w/o SoC name prefixes, except pclks for historic reasons
- Composite clock systematic naming : mux: X_sel, div:X_div, gate:X
- Parent table systematically named with the same name as the clock and
  a '_parents' suffix
- Group various tables next to the related clock
- etc ...

Doing so removes what would otherwise show up as unrelated diff in
following changes. It will allow to introduce common definitions for
peripheral clocks, probe helpers, composite clocks, etc ... making further
review and maintenance easier.

Link: https://lore.kernel.org/r/20250702-meson-clk-cleanup-24-v1-1-e163c9a1fc21@baylibre.com
Link: https://lore.kernel.org/r/20250702-meson-clk-cleanup-24-v1-2-e163c9a1fc21@baylibre.com
Link: https://lore.kernel.org/r/20250702-meson-clk-cleanup-24-v1-3-e163c9a1fc21@baylibre.com
Link: https://lore.kernel.org/r/20250702-meson-clk-cleanup-24-v1-4-e163c9a1fc21@baylibre.com
Link: https://lore.kernel.org/r/20250702-meson-clk-cleanup-24-v1-5-e163c9a1fc21@baylibre.com
Link: https://lore.kernel.org/r/20250702-meson-clk-cleanup-24-v1-6-e163c9a1fc21@baylibre.com
Link: https://lore.kernel.org/r/20250702-meson-clk-cleanup-24-v1-7-e163c9a1fc21@baylibre.com
Link: https://lore.kernel.org/r/20250702-meson-clk-cleanup-24-v1-8-e163c9a1fc21@baylibre.com
Link: https://lore.kernel.org/r/20250702-meson-clk-cleanup-24-v1-9-e163c9a1fc21@baylibre.com
Link: https://lore.kernel.org/r/20250702-meson-clk-cleanup-24-v1-10-e163c9a1fc21@baylibre.com
Link: https://lore.kernel.org/r/20250702-meson-clk-cleanup-24-v1-11-e163c9a1fc21@baylibre.com
Link: https://lore.kernel.org/r/20250702-meson-clk-cleanup-24-v1-12-e163c9a1fc21@baylibre.com
Link: https://lore.kernel.org/r/20250702-meson-clk-cleanup-24-v1-13-e163c9a1fc21@baylibre.com
Link: https://lore.kernel.org/r/20250702-meson-clk-cleanup-24-v1-14-e163c9a1fc21@baylibre.com


Reviewed-by: Chuan Liu <chuan.liu@amlogic.com> # For c3 and s4
[jbrunet: squashed all naming alignment changes together]
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>