common: cosmetic: CONFIG_ROOTPATH checkpatch compliance

Remove MK_STR from places that consume CONFIG_ROOTPATH to force all definitions to be string literals.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Cc: Joe Hershberger <joe.hershberger@gmail.com>
Cc: Wolfgang Denk <wd@denx.de>
Acked-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/include/configs/bf537-srv1.h b/include/configs/bf537-srv1.h
index da3681d..52d5d97 100644
--- a/include/configs/bf537-srv1.h
+++ b/include/configs/bf537-srv1.h
@@ -85,7 +85,7 @@
 #endif
 
 #define CONFIG_SYS_AUTOLOAD	"no"
-#define CONFIG_ROOTPATH		/romfs
+#define CONFIG_ROOTPATH		"/romfs"
 /* Uncomment next line to use fixed MAC address */
 /* #define CONFIG_ETHADDR	02:80:ad:20:31:42 */