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/MPC8360ERDK.h b/include/configs/MPC8360ERDK.h
index 909e8ab..cbe5a49 100644
--- a/include/configs/MPC8360ERDK.h
+++ b/include/configs/MPC8360ERDK.h
@@ -501,7 +501,7 @@
 #define CONFIG_HOSTNAME	mpc8360erdk
 #define CONFIG_BOOTFILE	uImage
 
-#define CONFIG_ROOTPATH		/nfsroot/
+#define CONFIG_ROOTPATH		"/nfsroot/"
 
 #define	CONFIG_BOOTDELAY 2	/* -1 disables auto-boot */
 #undef	CONFIG_BOOTARGS		/* the boot command will set bootargs */