drm/i2c: tda998x: remove useless NULL checks

There is no way 'priv' can be NULL in tda998x_irq_thread() - this can
only happen if request_threaded_irq() was passed a NULL priv pointer,
and we would have crashed long before then if that was the case.

We also always ensure that priv->encoder is correctly setup, which
must have been initialised prior to the interrupt being claimed, so we
can remove this check as well.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/gpu/drm/i2c/tda998x_drv.c

@@ -558,7 +558,7 @@ static void tda998x_hpd(struct work_struct *work)
 	struct tda998x_priv *priv =
 			container_of(dwork, struct tda998x_priv, dwork);
 
-	if (priv->encoder && priv->encoder->dev)
+	if (priv->encoder->dev)
 		drm_kms_helper_hotplug_event(priv->encoder->dev);
 }
 
@@ -570,8 +570,6 @@ static irqreturn_t tda998x_irq_thread(int irq, void *data)
 	struct tda998x_priv *priv = data;
 	u8 sta, cec, lvl, flag0, flag1, flag2;
 
-	if (!priv)
-		return IRQ_HANDLED;
 	sta = cec_read(priv, REG_CEC_INTSTATUS);
 	cec = cec_read(priv, REG_CEC_RXSHPDINT);
 	lvl = cec_read(priv, REG_CEC_RXSHPDLEV);