arm64: dts: imx95: add DT for DART-MX95 Development Kit

Add board DT based on the vendor kernel, but adapted for the
close-to-upstream kernel tree.

Co-developed-by: Leonid Segal <leonid.s@variscite.com>
Co-developed-by: FrancescoFerraro <francesco.f@variscite.com>
Signed-off-by: Leonid Segal <leonid.s@variscite.com>
Signed-off-by: FrancescoFerraro <francesco.f@variscite.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>