[Silabs] Added [[maybe_unused]] to remove errors from NDEBUG builds (#33315)

* Added NDEBUG ifndef to minimize code size

* Restyled by whitespace

* Restyled by clang-format

* Added #endif

* Added [[mayne_unused]]

---------

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

Author: CuRahman

examples/light-switch-app/silabs/src/ZclCallbacks.cpp

@@ -33,8 +33,8 @@ using namespace ::chip::app::Clusters;
 void MatterPostAttributeChangeCallback(const chip::app::ConcreteAttributePath & attributePath, uint8_t type, uint16_t size,
                                        uint8_t * value)
 {
-    ClusterId clusterId     = attributePath.mClusterId;
-    AttributeId attributeId = attributePath.mAttributeId;
+    ClusterId clusterId                      = attributePath.mClusterId;
+    [[maybe_unused]] AttributeId attributeId = attributePath.mAttributeId;
     ChipLogProgress(Zcl, "Cluster callback: " ChipLogFormatMEI, ChipLogValueMEI(clusterId));
 
     if (clusterId == OnOffSwitchConfiguration::Id)

examples/lock-app/silabs/src/ZclCallbacks.cpp

@@ -48,7 +48,7 @@ void MatterPostAttributeChangeCallback(const chip::app::ConcreteAttributePath &
 
     if (clusterId == DoorLock::Id && attributeId == DoorLock::Attributes::LockState::Id)
     {
-        DoorLock::DlLockState lockState = *(reinterpret_cast<DoorLock::DlLockState *>(value));
+        [[maybe_unused]] DoorLock::DlLockState lockState = *(reinterpret_cast<DoorLock::DlLockState *>(value));
         ChipLogProgress(Zcl, "Door lock cluster: " ChipLogFormatMEI " state %d", ChipLogValueMEI(clusterId),
                         to_underlying(lockState));
 #ifdef DIC_ENABLE