crypto: ccree - shared irq lines are not a bug

The ccree driver was logging an error if it got an interrupt but
HW indicated nothing to do as might happen if sharing an irq line.
Remove the error as this is normal and we already have a debug
print for the IRR register value.
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/ccree/cc_driver.c

@@ -103,10 +103,10 @@ static irqreturn_t cc_isr(int irq, void *dev_id)
 	/* read the interrupt status */
 	irr = cc_ioread(drvdata, CC_REG(HOST_IRR));
 	dev_dbg(dev, "Got IRR=0x%08X\n", irr);
-	if (irr == 0) { /* Probably shared interrupt line */
-		dev_err(dev, "Got interrupt with empty IRR\n");
+
+	if (irr == 0) /* Probably shared interrupt line */
 		return IRQ_NONE;
-	}
+
 	imr = cc_ioread(drvdata, CC_REG(HOST_IMR));
 
 	/* clear interrupt - must be before processing events */