doc: Update list of supported FVP platforms

Updated the list of supported FVP platforms with support for RD-N2 FVP.

Change-Id: I861bbb6d520c20e718f072e118c66dab61fe1386
Signed-off-by: Aditya Angadi <aditya.angadi@arm.com>

docs/plat/arm/fvp/index.rst

@@ -50,6 +50,7 @@ Arm FVPs without shifted affinities, and that do not support threaded CPU cores
 -  ``FVP_RD_N1_edge``      (Version 11.10 build 36)
 -  ``FVP_RD_N1_edge_dual`` (Version 11.10 build 36)
 -  ``FVP_RD_Daniel``       (Version 11.10 build 36)
+-  ``FVP_RD_N2``           (Version 11.13 build 10)
 -  ``FVP_TC0``             (Version 0.0 build 6114)
 -  ``Foundation_Platform``