drivers: remove what appears to be code from comments

Some tools consider this as commented code because of the ifdef, so
remove that and fix a coding guideline violation.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>
diff --git a/drivers/modem/quectel-bg9x.h b/drivers/modem/quectel-bg9x.h
index ed6624e..545ca5b 100644
--- a/drivers/modem/quectel-bg9x.h
+++ b/drivers/modem/quectel-bg9x.h
@@ -147,4 +147,4 @@
 #endif
 };
 
-#endif /* #ifndef QUECTEL_BG9X_H */
+#endif /* QUECTEL_BG9X_H */