clk: meson: update driver for g12a-ao clocks

Update g12a-ao clk driver:
- move clk->id check to .request function
- remove unnecessary check (gate->reg == 0)

Signed-off-by: Vyacheslav Bocharov <adeep@lexina.in>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20220424082159.757622-4-adeep@lexina.in