net: lwip/wget: correct SERVER_NAME_SIZE

The maximum length of a domain name is 253 as defined in RFC 1035.
So SERVER_NAME_SIZE should be 254 including NUL.

Fixes: 3c656c928bd7 ("net: lwip: add wget command")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/net/lwip/wget.c b/net/lwip/wget.c
index 26086ed..e85d57b 100644
--- a/net/lwip/wget.c
+++ b/net/lwip/wget.c
@@ -15,7 +15,7 @@
 #include <time.h>
 #include <dm/uclass.h>
 
-#define SERVER_NAME_SIZE 200
+#define SERVER_NAME_SIZE 254
 #define HTTP_PORT_DEFAULT 80
 #define HTTPS_PORT_DEFAULT 443
 #define PROGRESS_PRINT_STEP_BYTES (100 * 1024)