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/MPC8323ERDB.h b/include/configs/MPC8323ERDB.h
index a8657b1..5b73137 100644
--- a/include/configs/MPC8323ERDB.h
+++ b/include/configs/MPC8323ERDB.h
@@ -519,7 +519,7 @@
 #define CONFIG_NETDEV		eth1
 
 #define CONFIG_HOSTNAME		mpc8323erdb
-#define CONFIG_ROOTPATH		/nfsroot
+#define CONFIG_ROOTPATH		"/nfsroot"
 #define CONFIG_RAMDISKFILE	rootfs.ext2.gz.uboot
 #define CONFIG_BOOTFILE		uImage
 #define CONFIG_UBOOTPATH	u-boot.bin	/* U-Boot image on TFTP server */