Fix build errors and warnings / code cleanup.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/include/configs/gw8260.h b/include/configs/gw8260.h
index 79e6aa1..ff57240 100644
--- a/include/configs/gw8260.h
+++ b/include/configs/gw8260.h
@@ -294,7 +294,7 @@
 #define CONFIG_BOOTP_BOOTPATH
 
 #define CONFIG_BOOTP_BOOTFILESIZE
-#definef CONFIG_BOOTP_DNS
+#define CONFIG_BOOTP_DNS
 
 /* undef this to save memory */
 #define CFG_LONGHELP