i2c: ismt: propagate actual error code

Propagate actual return code when requesting interrupt fails.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
diff --git a/drivers/i2c/busses/i2c-ismt.c b/drivers/i2c/busses/i2c-ismt.c
index 3cc20f3..21cd4f6 100644
--- a/drivers/i2c/busses/i2c-ismt.c
+++ b/drivers/i2c/busses/i2c-ismt.c
@@ -817,7 +817,7 @@
 			       priv);
 	if (err) {
 		dev_err(&priv->pci_dev->dev, "no usable interrupts\n");
-		return -ENODEV;
+		return err;
 	}
 
 done: