tools:iio:generic_buffer: fix order of freeing data

data gets allocated before buffer_access, so it should be freed in reverse
order. Otherwise, if allocating buffer_access fails, an attempt to free it
would be taken, which should not happen.
Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

tools/iio/generic_buffer.c

@@ -345,10 +345,10 @@ int main(int argc, char **argv)
 
 error_close_buffer_access:
 	close(fp);
-error_free_data:
-	free(data);
 error_free_buffer_access:
 	free(buffer_access);
+error_free_data:
+	free(data);
 error_free_buf_dir_name:
 	free(buf_dir_name);
 error_free_triggername: