fconf: Fix misra issues

MISRA C-2012 Rule 20.7:
Macro parameter expands into an expression without being wrapped by parentheses.

MISRA C-2012 Rule 12.1:
Missing explicit parentheses on sub-expression.

MISRA C-2012 Rule 18.4:
Essential type of the left hand operand is not the same as that of the right
operand.

Include does not provide any needed symbols.

Change-Id: Ie1c6451cfbc8f519146c28b2cf15c50b1f36adc8
Signed-off-by: Louis Mayencourt <louis.mayencourt@arm.com>
diff --git a/include/lib/fconf/fconf.h b/include/lib/fconf/fconf.h
index f58ff57..0401e5c 100644
--- a/include/lib/fconf/fconf.h
+++ b/include/lib/fconf/fconf.h
@@ -14,9 +14,9 @@
 
 #define FCONF_REGISTER_POPULATOR(name, callback)				\
 	__attribute__((used, section(".fconf_populator")))			\
-	const struct fconf_populator name##__populator = {			\
-		.info = #name,							\
-		.populate = callback						\
+	const struct fconf_populator (name##__populator) = {			\
+		.info = (#name),						\
+		.populate = (callback)						\
 	};
 
 /*