arm64: dts: imx8mp-phycore-som: Order properties alphabetically

Rearrange properties in order:
- compatible
- reg
- other generic properties
- device specific properties
- vendor specific properties
- status

And use alphabetical order inside a group.

Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>