Revert "pinctrl: bcm: ns: support updated DT binding as syscon subnode"

Revert "pinctrl: bcm: ns: support updated DT binding as syscon subnode"

commit 6dba4bdfd7a30e77b848a45404b224588bf989e5 upstream.

This reverts commit 69371a53e14e730217456697355a6ad34fcfd1dd.

The updated binding was wrong / invalid and has been reverted. There
isn't any upstream kernel DTS using it and Broadcom isn't known to use
it neither. There is close to zero chance this will cause regression for
anyone.

Actually in-kernel bcm5301x.dtsi still uses the old good binding and so
it's broken since the driver update. This revert fixes it.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Link: https://lore.kernel.org/r/20211008205938.29925-3-zajec5@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>