firehose: Continue reading log entries after response

On db410c the target sends log entries after the response and refuse to
serve any subsequent requests until these are consumed, so continue
reading log entries until we get a timeout.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

firehose.c

@@ -120,9 +120,12 @@ static int firehose_read(struct qdl_device *qdl, int wait, int (*response_parser
 	if (wait > 0)
 		timeout = 10000;
 
-	while (!done) {
+	for (;;) {
 		n = qdl_read(qdl, buf, sizeof(buf), timeout);
 		if (n < 0) {
+			if (done)
+				break;
+
 			warn("failed to read");
 			return -ETIMEDOUT;
 		}
@@ -155,6 +158,7 @@ static int firehose_read(struct qdl_device *qdl, int wait, int (*response_parser
 					else
 						ret = response_parser(node);
 					done = true;
+					timeout = 1;
 				}
 			}