ARM: dts: stm32: phyboard-sargas and phycore: Fix coding style issues

ARM: dts: stm32: phyboard-sargas and phycore: Fix coding style issues

- Remove "stm32-pinfunc.h" include as it is already include in
"stm32mp15-pinctrl.dtsi" file.
- reserved-memory: reorder the memory sections (lower to higher
  addresses).
- Move vendor properties (go last).
- Remove useless compatible values:
  - QSPI flash: remove the winbond compatible. jedec is enought as the
    NOR flahses are detectable.
  - EEPROM: "atmel,24c32" is enought.
- Use uppercase for regulator-name properties.
- In pmic node: use the names from the PHYTEC SoM schematics.
- stmpe811 touch: fix dts schema to comply with st,stmpe.yaml.
- Fix one "multiple blank lines" detected by checkpatch.

Signed-off-by: Christophe Parant <c.parant@phytec.fr>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>