arm64: dts: renesas: rzg3s-smarc-som: Use switches' names to select on-board functionalities

The intention of the SW_SD0_DEV_SEL and SW_SD2_EN macros was to reflect the
state of the SW_CONFIG individual switches available on the RZ/G3S Smarc
Module, and at the same time to have a descriptive name for the switches
themselves.  Each individual switch is associated with a signal name,
which might be active-low or not on the board.  Using signal names
instead of SW_CONFIG switch names may be confusing for a user who just
playes with switches to select individual functionalities, but also for
an advanced user who looks at the schematics.  To avoid even further
confusion, use the switches' names here and instantiate them with an
ON/OFF state.  This should be simpler, even though the name of the
switches is not that intuitive.  The switches' names documentation
reflects the switches' purposes.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20231207070700.4156557-11-claudiu.beznea.uj@bp.renesas.com


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