Update SDK submodules to v2026.12-build.sisdk-2026.12-809 on release_2.10-1.6.1 (#1046)

* Update SDK submodules to v2026.12-build.sisdk-2026.12-809

* Using the SISDK lwip instead of wiseconnect

---------

Co-authored-by: silabs-ArghyaD <216648878+silabs-ArghyaD@users.noreply.github.com>
Co-authored-by: korino-silabs <pe1@silabs.com>

Author: 3 people

.gitmodules

@@ -5,11 +5,11 @@
 [submodule "third_party/simplicity_sdk"]
 	path = third_party/simplicity_sdk
 	url = https://github.com/SiliconLabsSoftware/sisdk-prerelease.git
-	tag = v2026.12-build.sisdk-2026.12-720
+	tag = v2026.12-build.sisdk-2026.12-809
 [submodule "third_party/wifi_sdk"]
 	path = third_party/wifi_sdk
 	url = https://github.com/SiliconLabsSoftware/wiseconnect-prerelease.git
-	tag = v2026.12-build.sisdk-2026.12-720
+	tag = v2026.12-build.sisdk-2026.12-809
 [submodule "third_party/aws_ota_sdk/ota-for-aws-iot-embedded-sdk"]
 	path = third_party/aws_ota_sdk/ota-for-aws-iot-embedded-sdk
 	url = https://github.com/aws/ota-for-aws-iot-embedded-sdk.git

slc/component/matter-wifi/matter_dual_stack.slcc

@@ -18,7 +18,7 @@ provides:
   - name: matter_lwip
   - name: lwip
   - name: lwip_port_freertos
-  - name: netstack_silabs_lwip_port_freertos
+  - name: silabs_lwip_port_freertos
   - name: sl_si91x_errno
 
 requires:

slc/component/matter-wifi/matter_lwip.slcc

@@ -14,7 +14,7 @@ provides:
   - name: matter_lwip
   - name: lwip
   - name: lwip_port_freertos
-  - name: netstack_silabs_lwip_port_freertos
+  - name: silabs_lwip_port_freertos
   - name: sl_si91x_errno
 
 requires: