cmd: wget: CONFIG_CMD_WGET must depend on CONFIG_CMD_NET

do_wget is defined in cmd/net.c.
cmd/net.c is not compiled if CONFIG_CMD_NET=n.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index bff22b94..2f63959 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -2117,6 +2117,7 @@
 
 config CMD_WGET
 	bool "wget"
+	depends on CMD_NET
 	default y if SANDBOX
 	select PROT_TCP if NET
 	select PROT_TCP_LWIP if NET_LWIP