arm64: dts: rockchip: fix probe of analog sound card on rock-3a

The following was observed on my Radxa ROCK 3 Model A board:

  rockchip-pinctrl pinctrl: pin gpio1-9 already requested by vcc-cam-regulator; cannot claim for fe410000.i2s
  ...
  platform rk809-sound: deferred probe pending

Fix this by supplying a board specific pinctrl with the i2s1 pins used
by pmic codec according to the schematic [1].

[1] https://dl.radxa.com/rock3/docs/hw/3a/ROCK-3A-V1.3-SCH.pdf

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Acked-by: Michael Riesch <michael.riesch@wolfvision.net>
Link: https://lore.kernel.org/r/20230115211553.445007-1-jonas@kwiboo.se
Signed-off-by: Heiko Stuebner <heiko@sntech.de>