doc: release: 3.1: Add notes about Gigadevice

Add 3.1.0 release notes for Gigadevice.

Signed-off-by: Gerson Fernando Budke <[email protected]>

Author: nandojve

doc/releases/release-notes-3.1.rst

@@ -236,8 +236,13 @@ Boards & SoC Support
 
 * Added support for these RISC-V boards:
 
+  * GigaDevice GD32VF103C-EVAL
+
 * Made these changes in other boards:
 
+  * gd32e103v_eval: Add prescaler to timer
+  * longan_nano: Add support for TF-Card slot
+
 * Added support for these following shields:
 
 
@@ -364,6 +369,11 @@ Libraries / Subsystems
 HALs
 ****
 
+* GigaDevice
+
+  * Fixed GD32_REMAP_MSK macro
+  * Fixed gd32f403z pc3 missing pincodes
+
 MCUboot
 *******