SYSLINK: ipc - fixed api return status in messageq and listmo

This patch fixes the problem with the premature exit of module ioctl
functions. This has caused the api return status to be not visible in
the user-space.

Signed-off-by; Suman Anna <s-anna@ti.com>

drivers/dsp/syslink/multicore_ipc/listmp_sharedmemory_ioctl.c

@@ -653,7 +653,7 @@ int listmp_sharedmemory_ioctl(struct inode *inode, struct file *filp,
 		os_status = -ENOTTY;
 		break;
 	}
-	if (!os_status)
+	if (os_status < 0)
 		goto exit;
 
 	/* Copy the full args to the user-side. */

drivers/dsp/syslink/multicore_ipc/messageq_ioctl.c

@@ -475,7 +475,7 @@ int messageq_ioctl(struct inode *inode, struct file *filp,
 		os_status = -ENOTTY;
 		break;
 	}
-	if (!os_status)
+	if (os_status < 0)
 		goto exit;
 
 	/* Copy the full args to the user-side. */

drivers/dsp/syslink/multicore_ipc/messageq_transportshm_ioctl.c

@@ -319,7 +319,7 @@ int messageq_transportshm_ioctl(struct inode *inode, struct file *filp,
 		os_status = -ENOTTY;
 		break;
 	}
-	if (!os_status)
+	if (os_status < 0)
 		goto exit;
 
 	/* Copy the full args to the user-side. */