boards: Add backward compatibility for renamed FVP boards

Add deprecated.cmake mappings to redirect old board names to new
unified structure:

- fvp_base_revc_2xaemv8a
→ fvp_base_revc_2xaem/v8a

- fvp_base_revc_2xaemv8a/fvp_base_revc_2xaemv8a/smp
→ fvp_base_revc_2xaem/v8a/smp

- fvp_base_revc_2xaemv8a/fvp_base_revc_2xaemv8a/smp/ns
→ fvp_base_revc_2xaem/v8a/smp/ns

This ensures existing build commands and documentation continue to work
with deprecation warnings while transitioning to the new board structure.

Signed-off-by: Nicolas Pitre <[email protected]>

Author: Nicolas Pitre

boards/arm/fvp_base_revc_2xaem/doc/index.rst

@@ -132,6 +132,17 @@ then export the :envvar:`ARMFVP_BL1_FILE` and :envvar:`ARMFVP_FIP_FILE` environm
    export ARMFVP_BL1_FILE=<path/to/tfa-a/build/fvp/release/bl1.bin>
    export ARMFVP_FIP_FILE=<path/to/tfa-a/build/fvp/release/fip.bin>
 
+Migration from Legacy Board Names
+*********************************
+
+The legacy board name ``fvp_base_revc_2xaemv8a`` has been replaced with the
+unified ``fvp_base_revc_2xaem/v8a`` naming. Update your build commands:
+
+* Old: ``west build -b fvp_base_revc_2xaemv8a``
+* New: ``west build -b fvp_base_revc_2xaem/v8a``
+
+The legacy board name remains supported for backward compatibility.
+
 Debugging
 =========
 

boards/deprecated.cmake

@@ -67,3 +67,12 @@ set(esp32_devkitc_wrover/esp32/appcpu_DEPRECATED
 set(scobc_module1_DEPRECATED
     scobc_a1
 )
+set(fvp_base_revc_2xaemv8a_DEPRECATED
+    fvp_base_revc_2xaem/v8a
+)
+set(fvp_base_revc_2xaemv8a/fvp_base_revc_2xaemv8a/smp_DEPRECATED
+    fvp_base_revc_2xaem/v8a/smp
+)
+set(fvp_base_revc_2xaemv8a/fvp_base_revc_2xaemv8a/smp/ns_DEPRECATED
+    fvp_base_revc_2xaem/v8a/smp/ns
+)