dt-bindings: soc: xilinx: Add support for K24, KR260 and KD240 CCs

dt-bindings: soc: xilinx: Add support for K24, KR260 and KD240 CCs

The commit 7a4c31ee877a ("arm64: zynqmp: Add support for Xilinx Kria SOM
board") has added support for k26 and kv260 and the commit dbcd27526e6a
("dt-bindings: soc: xilinx: Add support for KV260 CC") has added support
for KV260 and this is follow up patch for adding description for k24 SOM,
KR260 (robotics platform) and KD240 (driver platform).
The bootflow is the same that's why for more information please take a look
at above commits.

The KD240 kit is based on smaller k24 SOM with only 2GB of memory.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/8ff66d0dc4e0de6f239c25d43a2a96b4224305e8.1752837842.git.michal.simek@amd.com