net: wget: let wget_with_dns work with dns disabled

This was marked as TODO in the code:
 - Enable use of wget_with_dns even if CMD_DNS is disabled if
   the given uri has the ip address for the http server.
 - Move the check for CMD_DNS inside wget_with_dns.
 - Rename wget_with_dns to wget_do_request

Signed-off-by: Adriano Cordova <adrianox@gmail.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
diff --git a/net/lwip/wget.c b/net/lwip/wget.c
index 263d6da..669eded 100644
--- a/net/lwip/wget.c
+++ b/net/lwip/wget.c
@@ -353,7 +353,7 @@
 	return -1;
 }
 
-int wget_with_dns(ulong dst_addr, char *uri)
+int wget_do_request(ulong dst_addr, char *uri)
 {
 	eth_set_current();
 
@@ -387,7 +387,7 @@
 		return CMD_RET_FAILURE;
 
 	wget_info = &default_wget_info;
-	if (wget_with_dns(dst_addr, nurl))
+	if (wget_do_request(dst_addr, nurl))
 		return CMD_RET_FAILURE;
 
 	return CMD_RET_SUCCESS;