i2c-designware: Remove an useless local variable "num"

We couldn't know the original intent for this variable, but at this
point it's useless.

Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi@necel.com>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

drivers/i2c/busses/i2c-designware.c

@@ -257,7 +257,6 @@ static void
 i2c_dw_xfer_msg(struct dw_i2c_dev *dev)
 {
 	struct i2c_msg *msgs = dev->msgs;
-	int num = dev->msgs_num;
 	u32 ic_con, intr_mask;
 	int tx_limit = dev->tx_fifo_depth - readl(dev->base + DW_IC_TXFLR);
 	int rx_limit = dev->rx_fifo_depth - readl(dev->base + DW_IC_RXFLR);
@@ -283,7 +282,7 @@ i2c_dw_xfer_msg(struct dw_i2c_dev *dev)
 		writel(1, dev->base + DW_IC_ENABLE);
 	}
 
-	for (; dev->msg_write_idx < num; dev->msg_write_idx++) {
+	for (; dev->msg_write_idx < dev->msgs_num; dev->msg_write_idx++) {
 		/* if target address has changed, we need to
 		 * reprogram the target address in the i2c
 		 * adapter when we are done with this transfer
@@ -330,11 +329,10 @@ static void
 i2c_dw_read(struct dw_i2c_dev *dev)
 {
 	struct i2c_msg *msgs = dev->msgs;
-	int num = dev->msgs_num;
 	u32 addr = msgs[dev->msg_read_idx].addr;
 	int rx_valid = readl(dev->base + DW_IC_RXFLR);
 
-	for (; dev->msg_read_idx < num; dev->msg_read_idx++) {
+	for (; dev->msg_read_idx < dev->msgs_num; dev->msg_read_idx++) {
 		u32 len;
 		u8 *buf;