clk: meson: add 'NOINIT_ENABLED' flag to eliminate init for enabled PLL

clk: meson: add 'NOINIT_ENABLED' flag to eliminate init for enabled PLL

When dealing with certain PLLs, it is necessary to avoid modifying them
if they have already been initialized by lower levels. For instance, in
the A1 SoC Family, the sys_pll is enabled as the parent for the cpuclk,
and it cannot be disabled during the initialization sequence. Therefore,
initialization phase must be skipped.

Signed-off-by: Dmitry Rokosov <ddrokosov@salutedevices.com>
Link: https://lore.kernel.org/r/20240515185103.20256-2-ddrokosov@salutedevices.com
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>