MLK-18180 ARM64: dts: correct the pad configurations of pcie

MLK-18180 ARM64: dts: correct the pad configurations of pcie

The correct default should be 0x04000021. In which we have the open
drain input option for field [25:26] with a pull up resistor and low
drive strength. This will allow the end point device to drive low the
wake and clkreq signals when necessary and don't have the PCIe
driving back to the endpoint device.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
(cherry picked from commit 2d3e439c1b32d78807bfc74dfc90f62aa897a709)