[Silabs] Bugfixes for the WiFi 91x NCP and SoC combos (#31484)

* Pull request #1476: MATTER-2944 : Adding the is_debug=false flag

Merge in WMN_TOOLS/matter from bugfix/adding_is_debug_flag to RC_2.3.0-1.3

Squashed commit of the following:

commit 31d39faeff5c49db04a475e1fa0b79d0b73a7456
Author: chbansal <chirag.bansal@silabs.com>
Date:   Thu Jan 11 22:00:30 2024 +0530

    adding is_debug=false by default

* updating the matter_support,enabling ble by default for 91x and disabling lcd for SiWx917

* pointing to the correct commit

* Restyled by gn

* removing the multiple declaring of ble argument

---------

Co-authored-by: Restyled.io <commits@restyled.io>

third_party/silabs/silabs_board.gni

@@ -34,7 +34,6 @@ declare_args() {
   use_wf200 = false
   use_rs9116 = false
   use_SiWx917 = false
-  chip_enable_ble_rs911x = false
 
   wifi_soc = false
 
@@ -54,12 +53,21 @@ declare_args() {
 declare_args() {
   # Enables LCD Qr Code on supported devices
   show_qr_code = !disable_lcd
+
+  # Enabling BLE on 9116/917 NCP by default
+  chip_enable_ble_rs911x = use_rs9116 || use_SiWx917
 }
 
 if (silabs_board == "") {
   silabs_board = getenv("SILABS_BOARD")
 }
 
+# TODO - Enable LCD once multiplexing changes added MATTER-2763
+if (use_SiWx917) {
+  disable_lcd = true
+  show_qr_code = false
+}
+
 assert(silabs_board != "", "silabs_board must be specified")
 
 # Differentiate between boards