doc: release-notes-3.7: add fpga release notes

Add fpga release notes for v3.7.0

Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
diff --git a/doc/releases/release-notes-3.7.rst b/doc/releases/release-notes-3.7.rst
index ef2841c..3d87275 100644
--- a/doc/releases/release-notes-3.7.rst
+++ b/doc/releases/release-notes-3.7.rst
@@ -1725,6 +1725,11 @@
   * CMSIS-NN was updated to v6.0.0 from v4.1.0:
     https://arm-software.github.io/CMSIS-NN/latest/rev_hist.html
 
+* FPGA
+
+  * Improve handling of drivers missing reset, load, get_status, and get_info methods.
+  * Add support for Agilex and Agilex 5.
+
 * Random
 
   * Besides the existing :c:func:`sys_rand32_get` function, :c:func:`sys_rand8_get`,