MLK-11919 Check return value

Coverity reported:
CID 17590 (#1 of 1): Unchecked return value (CHECKED_RETURN)
1. check_return: Calling device_reset without checking return value

Fixed the warning by checking return value of device_reset.

Signed-off-by: Hongzhang Yang <Hongzhang.Yang@freescale.com>

Author: Hongzhang Yang

drivers/mxc/vpu/mxc_vpu.c

@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2014 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2006-2015 Freescale Semiconductor, Inc. All Rights Reserved.
  */
 
 /*
@@ -175,7 +175,8 @@ static int cpu_is_mx6q(void)
 static void vpu_reset(void)
 {
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)
-	device_reset(vpu_dev);
+	if (device_reset(vpu_dev))
+		dev_err(vpu_dev, "failed to reset vpu\n");
 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
 	imx_src_reset_vpu();
 #else