ADS5121: fix typo in "rootpath" default setting

Signed-off-by: Wolfgang Denk <wd@denx.de>

include/configs/ads5121.h

@@ -421,7 +421,7 @@
 
 #define CONFIG_HOSTNAME		ads5121
 #define CONFIG_BOOTFILE		ads5121/uImage
-#define CONFIG_ROOTPATH		/opt/eldk/pcc_6xx
+#define CONFIG_ROOTPATH		/opt/eldk/ppc_6xx
 
 #define CONFIG_LOADADDR		400000	/* default location for tftp and bootm */