regression 6000: fix buffer part compared in 6010 test.

Second half of output buffer was compared in regression test 6010,
whereas first part was filled. Now compare correct part.

Signed-off-by: Mélanie Favre <melanie.favre@provenrun.com>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
diff --git a/host/xtest/regression_6000.c b/host/xtest/regression_6000.c
index ddbfb42..336ea14 100644
--- a/host/xtest/regression_6000.c
+++ b/host/xtest/regression_6000.c
@@ -1368,7 +1368,7 @@
 
 	ADBG_EXPECT_BUFFER(c,
 		data + sizeof(data) / 2, sizeof(data) / 2,
-		out + sizeof(data) / 2, n);
+		out, n);
 
 seek_write_read_out:
 	ADBG_EXPECT_TEEC_SUCCESS(c, fs_unlink(&sess, o1));