doc: board: ti: *: Add platform information

Add link to the actual platform for folks to find details about the
board in addition to the SoC's TRM.

Signed-off-by: Nishanth Menon <nm@ti.com>
diff --git a/doc/board/ti/j7200_evm.rst b/doc/board/ti/j7200_evm.rst
index 33d8491..69abc55 100644
--- a/doc/board/ti/j7200_evm.rst
+++ b/doc/board/ti/j7200_evm.rst
@@ -26,6 +26,10 @@
 
 More info can be found in TRM: https://www.ti.com/lit/pdf/spruiu1
 
+Platform information:
+
+* https://www.ti.com/tool/J7200XSOMXEVM
+
 Boot Flow:
 ----------
 Below is the pictorial representation of boot flow: