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/stxgp3.h b/include/configs/stxgp3.h
index 6f611be..8e46c52 100644
--- a/include/configs/stxgp3.h
+++ b/include/configs/stxgp3.h
@@ -377,7 +377,7 @@
 #define CONFIG_GATEWAYIP	192.168.85.1
 #define CONFIG_NETMASK		255.255.255.0
 #define CONFIG_HOSTNAME		STX_GP3
-#define CONFIG_ROOTPATH		/gppproot
+#define CONFIG_ROOTPATH		"/gppproot"
 #define CONFIG_BOOTFILE		uImage
 #define CONFIG_LOADADDR		0x1000000