[Silabs] [SiWx917] Addressing build failures on 917 SOC due to GCC update (#26266)

* addressing build failures on 917 SOC due to GCC update

* updating the matter support pointer

Author: chirag-silabs

examples/platform/silabs/SiWx917/BUILD.gn

@@ -186,6 +186,8 @@ config("siwx917-common-config") {
   if (siwx917_commissionable_data) {
     defines += [ "SIWX917_USE_COMISSIONABLE_DATA=1" ]
   }
+
+  ldflags = [ "-Wl,--no-warn-rwx-segment" ]
 }
 
 config("silabs-wifi-config") {
@@ -238,6 +240,7 @@ source_set("siwx917-common") {
   sources = [
     "${silabs_common_plat_dir}/LEDWidget.cpp",
     "${silabs_common_plat_dir}/heap_4_silabs.c",
+    "${silabs_common_plat_dir}/syscalls_stubs.cpp",
     "${wifi_sdk_dir}/dhcp_client.cpp",
     "${wifi_sdk_dir}/ethernetif.cpp",
     "${wifi_sdk_dir}/lwip_netif.cpp",

src/platform/silabs/SiWx917/wifi/dhcp_client.h

@@ -18,6 +18,7 @@
 #if LWIP_IPV4 && LWIP_DHCP
 
 #pragma once
+#include <stdint.h>
 #ifdef __cplusplus
 extern "C" {
 #endif

src/platform/silabs/SiWx917/wifi/wfx_msgs.h

@@ -17,6 +17,8 @@
 
 #ifndef _WFX_MSGS_H_
 #define _WFX_MSGS_H_
+
+#include <stdint.h>
 /*
  * Taken from sl_wfx firmware - so I can re-use.
  * I need to do a better job than to use this stuff