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/inka4x0.h b/include/configs/inka4x0.h
index b19d544..0d9dbef 100644
--- a/include/configs/inka4x0.h
+++ b/include/configs/inka4x0.h
@@ -135,7 +135,7 @@
 #define	CONFIG_NETMASK		255.255.255.0
 #define HOSTNAME		inka4x0
 #define CONFIG_BOOTFILE		/tftpboot/inka4x0/uImage
-#define	CONFIG_ROOTPATH		/opt/eldk/ppc_6xx
+#define	CONFIG_ROOTPATH		"/opt/eldk/ppc_6xx"
 
 #define CONFIG_EXTRA_ENV_SETTINGS					\
 	"netdev=eth0\0"							\