arm64: dts: add imx95-libra-rdk-fpsc board

Add device tree for the Libra-i.MX 95 FPSC board. The Libra is a
pure development board and has hardware to support FPSC-24-A.0 set of
features. The phyCORE-i.MX 95 FPSC [1] SoM uses only a subset of
the hardware features of the Libra board. The phyCORE-i.MX 95 FPSC
itself is a System on Module designed around the i.MX 95 SoC.
The SoM and board utilize the Future Proof Solder Core [2] BGA standard
to connect to each other.

To be able to easily map FPSC interface names to SoC interfaces, the
FPSC interface names are added as inline comments. Example:

&lpi2c5 { /* I2C2 */
	pinctrl-0 = <&pinctrl_lpi2c5>;
	[...]
};

Here, I2C2 is the FPSC interface name. The lpi2c5 instance of the i.MX 95
SoC is used to fulfill the i2c functionality and its signals are routed
to the FPSC I2C2 signal pins:

pinctrl_lpi2c5: lpi2c5grp {
	fsl,pins = <
		IMX95_PAD_GPIO_IO22__LPI2C5_SDA	0x40000b9e	/* I2C2_SDA */
		IMX95_PAD_GPIO_IO23__LPI2C5_SCL 0x40000b9e	/* I2C2_SCL */
	>;
};

[1] https://www.phytec.eu/en/produkte/system-on-modules/phycore-imx-95-fpsc/
[2] https://www.phytec.eu/en/produkte/system-on-modules/fpsc/

Signed-off-by: Yannic Moog <y.moog@phytec.de>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

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