net, net-lwip: wget: suppress console output when called by EFI

Functions called from EFI applications should not do console output.
Refactor the wget code to implement this requirement. The wget_http_info
struct is used to hold the boolean that signifies whether the output is
allowed or not.

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Reported-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/include/net-common.h b/include/net-common.h
index e536968..7853612 100644
--- a/include/net-common.h
+++ b/include/net-common.h
@@ -570,6 +570,7 @@
  *			Filled by client.
  * @hdr_cont_len:	content length according to headers. Filled by wget
  * @headers:		buffer for headers. Filled by wget.
+ * @silent:		do not print anything to the console. Filled by client.
  */
 struct wget_http_info {
 	enum wget_http_method method;
@@ -580,6 +581,7 @@
 	bool check_buffer_size;
 	u32 hdr_cont_len;
 	char *headers;
+	bool silent;
 };
 
 extern struct wget_http_info default_wget_info;