nfc: s3fwrn5: Remove unneeded 'ret' variable

The local variable 'ret' can be removed:

  drivers/nfc/s3fwrn5/i2c.c:167:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/nfc/s3fwrn5/i2c.c

@@ -164,7 +164,6 @@ static int s3fwrn5_i2c_read(struct s3fwrn5_i2c_phy *phy)
 static irqreturn_t s3fwrn5_i2c_irq_thread_fn(int irq, void *phy_id)
 {
 	struct s3fwrn5_i2c_phy *phy = phy_id;
-	int ret = 0;
 
 	if (!phy || !phy->ndev) {
 		WARN_ON_ONCE(1);
@@ -179,10 +178,9 @@ static irqreturn_t s3fwrn5_i2c_irq_thread_fn(int irq, void *phy_id)
 	switch (phy->mode) {
 	case S3FWRN5_MODE_NCI:
 	case S3FWRN5_MODE_FW:
-		ret = s3fwrn5_i2c_read(phy);
+		s3fwrn5_i2c_read(phy);
 		break;
 	case S3FWRN5_MODE_COLD:
-		ret = -EREMOTEIO;
 		break;
 	}