crypto: omap-sham - irq handler must not clear error code

Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/omap-sham.c

@@ -1084,7 +1084,6 @@ static irqreturn_t omap_sham_irq(int irq, void *dev_id)
 	omap_sham_read(dd, SHA_REG_CTRL);
 
 	set_bit(FLAGS_OUTPUT_READY, &dd->flags);
-	dd->err = 0;
 	tasklet_schedule(&dd->done_task);
 
 	return IRQ_HANDLED;