arm64: dts: imx8mp: Fix TC9595 reset GPIO on DH i.MX8M Plus DHCOM SoM

[ Upstream commit 418a7fc5 ]

The TC9595 reset GPIO is SAI1_RXC / GPIO4_IO01, fix the DT accordingly.
The SAI5_RXD0 / GPIO3_IO21 is thus far unused TC9595 interrupt line.

Fixes: 20d0b83e ("arm64: dts: imx8mp: Add TC9595 bridge on DH electronics i.MX8M Plus DHCOM")
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Stable-dep-of: c03984d4 ("arm64: dts: imx8mp: Fix TC9595 input clock on DH i.MX8M Plus DHCOM SoM")
Signed-off-by: Sasha Levin <sashal@kernel.org>