clk: clk-axi-clkgen: fix coding style issues

This is just cosmetics and so no functional changes intended.

While at it, sort header in alphabetical order.

Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20250519-dev-axi-clkgen-limits-v6-7-bc4b3b61d1d4@analog.com


Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>