Fix static analysis errors

Fix checkpatch and cppcheck findings in newly added FWU files.

Change-Id: Ie6a877e65b758399647ceda345ae22081d911f8e
Signed-off-by: Gyorgy Szing <Gyorgy.Szing@arm.com>
diff --git a/protocols/service/fwu/packed-c/metadata.h b/protocols/service/fwu/packed-c/metadata.h
index b89cc9e..7a3c4fb 100644
--- a/protocols/service/fwu/packed-c/metadata.h
+++ b/protocols/service/fwu/packed-c/metadata.h
@@ -16,7 +16,7 @@
  * With the default configuration, a dual bank A/B scheme is used.
  */
 #ifndef FWU_METADATA_NUM_BANKS
-#define FWU_METADATA_NUM_BANKS            (2)
+#define FWU_METADATA_NUM_BANKS (2)
 #endif
 
 #endif /* FWU_PROTO_METADATA_H */