Revert "dmaengine: dmatest: timeout value of -1 should specify infinite wait"

This reverts commit ed04b7c5.

While it gives a good description what happens, the approach seems too
confusing. Let's fix it in the following patch.

Cc: Gary Hook <Gary.Hook@amd.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200424161147.16895-3-andriy.shevchenko@linux.intel.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/dmatest.c

@@ -62,7 +62,7 @@ MODULE_PARM_DESC(pq_sources,
 static int timeout = 3000;
 module_param(timeout, uint, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(timeout, "Transfer Timeout in msec (default: 3000), "
-		 "Pass 0xFFFFFFFF (4294967295) for maximum timeout");
+		 "Pass -1 for infinite timeout");
 
 static bool noverify;
 module_param(noverify, bool, S_IRUGO | S_IWUSR);
@@ -98,7 +98,7 @@ MODULE_PARM_DESC(transfer_size, "Optional custom transfer size in bytes (default
  * @iterations:		iterations before stopping test
  * @xor_sources:	number of xor source buffers
  * @pq_sources:		number of p+q source buffers
- * @timeout:		transfer timeout in msec, 0 - 0xFFFFFFFF (4294967295)
+ * @timeout:		transfer timeout in msec, -1 for infinite timeout
  */
 struct dmatest_params {
 	unsigned int	buf_size;
@@ -109,7 +109,7 @@ struct dmatest_params {
 	unsigned int	iterations;
 	unsigned int	xor_sources;
 	unsigned int	pq_sources;
-	unsigned int	timeout;
+	int		timeout;
 	bool		noverify;
 	bool		norandom;
 	int		alignment;