arm64: dts: freescale: Add PHYTEC phyBOARD-Nash-i.MX93 support

arm64: dts: freescale: Add PHYTEC phyBOARD-Nash-i.MX93 support

Add initial support for PHYTEC phyBOARD-Nash-i.MX93 board [1] based on
the PHYTEC phyCORE-i.MX93 SoM (System-on-Module) [2].

Supported board features:
 * ADC
 * CAN
 * Ethernet
 * EEPROM
 * RTC
 * RS-232/RS-485
 * SD-card
 * TPM 2.0
 * USB

For more details see the product pages for the development kit and the
SoM:

[1] https://www.phytec.eu/en/produkte/development-kits/phyboard-nash/
[2] https://www.phytec.eu/en/produkte/system-on-modules/phycore-imx-91-93/

Signed-off-by: Primoz Fiser <primoz.fiser@norik.com>
Reviewed-by: Wadim Egorov <w.egorov@phytec.de>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>