riscv: dts: allwinner: d1s-t113: Add pinctrl's required by NetCube Systems Nagami SoM

riscv: dts: allwinner: d1s-t113: Add pinctrl's required by NetCube Systems Nagami SoM

Added the following pinctrl's used by the NetCube Systems Nagami SoM
  * i2c2_pins
  * i2c3_pins
  * i2s1_pins, i2s1_din_pins, i2s1_dout_pins
  * spi1_pins, spi1_hold_pin, spi1_wp_pin

Signed-off-by: Lukas Schmid <lukas.schmid@netcube.li>
Link: https://patch.msgid.link/20250831162536.2380589-3-lukas.schmid@netcube.li
[wens@csie.org: Fix up node names and labels for i2c* and i2s1_d* pins]
Signed-off-by: Chen-Yu Tsai <wens@csie.org>