clang-format: add entry for SYS_SEM_LOCK()

SYS_SEM_LOCK() is a for-loop-like macro similar inspired by
K_SPINLOCK().

Add an entry to .clang-format so that autoformatting works as
expected.

Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
diff --git a/.clang-format b/.clang-format
index 1501274..dafdf80 100644
--- a/.clang-format
+++ b/.clang-format
@@ -43,6 +43,7 @@
   - 'SYS_DLIST_FOR_EACH_CONTAINER_SAFE'
   - 'SYS_DLIST_FOR_EACH_NODE'
   - 'SYS_DLIST_FOR_EACH_NODE_SAFE'
+  - 'SYS_SEM_LOCK'
   - 'SYS_SFLIST_FOR_EACH_CONTAINER'
   - 'SYS_SFLIST_FOR_EACH_CONTAINER_SAFE'
   - 'SYS_SFLIST_FOR_EACH_NODE'