arm64: dts: zii-ultra: fix ARM regulator GPIO handle

arm64: dts: zii-ultra: fix ARM regulator GPIO handle

BugLink: https://bugs.launchpad.net/bugs/1855306
[ Upstream commit f852497c9a07ec9913bb3f3db5f096a8e2ab7e03 ]

The GPIO handle is referencing the wrong GPIO, so the voltage did not
actually change as intended. The pinmux is already correct, so just
correct the GPIO number.

Fixes: 4a13b3bec3b4 (arm64: dts: imx: add Zii Ultra board support)
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Connor Kuehl <connor.kuehl@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>