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/RRvision.h b/include/configs/RRvision.h
index 7dcc14c..0f8084e 100644
--- a/include/configs/RRvision.h
+++ b/include/configs/RRvision.h
@@ -60,7 +60,7 @@
 #define CONFIG_IPADDR                 10.0.0.5
 #define CONFIG_SERVERIP               10.0.0.2
 #define CONFIG_NETMASK                255.0.0.0
-#define CONFIG_ROOTPATH               /opt/eldk/ppc_8xx
+#define CONFIG_ROOTPATH               "/opt/eldk/ppc_8xx"
 #define CONFIG_BOOTCOMMAND            "run flash_self"
 
 #define	CONFIG_EXTRA_ENV_SETTINGS					\