arm64: dts: imx8mp: Fix I2C5 GPIO assignment on i.MX8M Plus DHCOM

Fix copy-paste error of the I2C5 bus recovery GPIO assignment,
the I2C5 GPIOs are on gpio3 instead of gpio5.

Fixes: 8d671269

 ("arm64: dts: imx8mp: Add support for DH electronics i.MX8M Plus DHCOM and PDK2")
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>