dt-bindings: nvmem: add new stm32mp25 compatible for stm32-romem

Add a new compatible for stm32mp25 support.

Signed-off-by: Patrick Delaunay <[e-mail]>
Acked-by: Conor Dooley <[e-mail]>
Signed-off-by: Srinivas Kandagatla <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

Documentation/devicetree/bindings/nvmem/st,stm32-romem.yaml

···
       - st,stm32f4-otp
       - st,stm32mp13-bsec
       - st,stm32mp15-bsec
+      - st,stm32mp25-bsec
 
   reg:
     maxItems: 1