arm64: dts: renesas: rzg2lc-smarc: Enable Audio

Enable Audio on RZ/G2LC SMARC EVK by deleting ssi0 entries from
board DT and adding pincontrol entries to the soc-pinctrl dtsi,
so that entries from common dtsi kick in and make audio functionality
operational.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20220303164155.7706-5-biju.das.jz@bp.renesas.com


Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>