Added support for MG24(BRD4186C and BRD4187C) RS911x (#21848)

diff --git a/third_party/silabs/matter_support b/third_party/silabs/matter_support
index a7801b3..c9d65e0 160000
--- a/third_party/silabs/matter_support
+++ b/third_party/silabs/matter_support
@@ -1 +1 @@
-Subproject commit a7801b3fa493270b6832061ec9997eca3767ba67
+Subproject commit c9d65e0111fb7708d41f86bc999bb22de43b5915