dt-bindings: rcc: stm32: Sync with u-boot copy for STM32MP13 SoC

Minor cosmetic change, aligned with files in U-Boot:
- change obsolete SPDX id : GPL-2.0+ and use the same license
  GPL-2.0-only for the 2 files
- use correct mail address gabriel.fernandez@foss.st.com
- remove extra space

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Link: https://lore.kernel.org/r/20230510184305.v2.1.I417093ddcea282be479f10a37147d1935a9050b7@changeid


Acked-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Gabriel Fernandez <gabriel.fernandez@foss.st.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>