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/MPC8313ERDB.h b/include/configs/MPC8313ERDB.h
index 7f52bb1..aa7c114 100644
--- a/include/configs/MPC8313ERDB.h
+++ b/include/configs/MPC8313ERDB.h
@@ -597,7 +597,7 @@
 #define CONFIG_NETDEV		eth1
 
 #define CONFIG_HOSTNAME		mpc8313erdb
-#define CONFIG_ROOTPATH		/nfs/root/path
+#define CONFIG_ROOTPATH		"/nfs/root/path"
 #define CONFIG_BOOTFILE		uImage
 #define CONFIG_UBOOTPATH	u-boot.bin	/* U-Boot image on TFTP server */
 #define CONFIG_FDTFILE		mpc8313erdb.dtb