arm64: dts: renesas: rzg2l-smarc: Move pinctrl definitions

arm64: dts: renesas: rzg2l-smarc: Move pinctrl definitions

RZ/G2L and RZ/G2LC SMARC EVK use the same carrier board, but the pin
mappings between the RZ/G2L and the RZ/G2LC SMARC SoM are different.
Therefore we need to update the carrier board pin definitions based
on the corresponding SoM pin mapping.

Move pinctrl definitions out of the RZ/G2L SMARC common file, so that
we can reuse the common file to support RZ/G2LC SMARC EVK.

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/20211216114305.5842-2-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>