i2c: mlxbf: Use str_read_write() helper

Remove hard-coded strings by using the str_read_write() helper.

Signed-off-by: Feng Wei <feng.wei8@zte.com.cn>
Signed-off-by: Shao Mingyin <shao.mingyin@zte.com.cn>
Link: https://lore.kernel.org/r/20250401192603311H5OxuFmUSbPc4VnQQkhZr@zte.com.cn
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>

Author: fengwei0328

drivers/i2c/busses/i2c-mlxbf.c

@@ -19,6 +19,7 @@
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/string.h>
+#include <linux/string_choices.h>
 
 /* Defines what functionality is present. */
 #define MLXBF_I2C_FUNC_SMBUS_BLOCK \
@@ -2038,37 +2039,37 @@ static s32 mlxbf_i2c_smbus_xfer(struct i2c_adapter *adap, u16 addr,
 					  read ? &data->byte : &command, read,
 					  pec);
 		dev_dbg(&adap->dev, "smbus %s byte, slave 0x%02x.\n",
-			read ? "read" : "write", addr);
+			str_read_write(read), addr);
 		break;
 
 	case I2C_SMBUS_BYTE_DATA:
 		mlxbf_i2c_smbus_data_byte_func(&request, &command, &data->byte,
 					       read, pec);
 		dev_dbg(&adap->dev, "smbus %s byte data at 0x%02x, slave 0x%02x.\n",
-			read ? "read" : "write", command, addr);
+			str_read_write(read), command, addr);
 		break;
 
 	case I2C_SMBUS_WORD_DATA:
 		mlxbf_i2c_smbus_data_word_func(&request, &command,
 					       (u8 *)&data->word, read, pec);
 		dev_dbg(&adap->dev, "smbus %s word data at 0x%02x, slave 0x%02x.\n",
-			read ? "read" : "write", command, addr);
+			str_read_write(read), command, addr);
 		break;
 
 	case I2C_SMBUS_I2C_BLOCK_DATA:
 		byte_cnt = data->block[0];
 		mlxbf_i2c_smbus_i2c_block_func(&request, &command, data->block,
 					       &byte_cnt, read, pec);
 		dev_dbg(&adap->dev, "i2c %s block data, %d bytes at 0x%02x, slave 0x%02x.\n",
-			read ? "read" : "write", byte_cnt, command, addr);
+			str_read_write(read), byte_cnt, command, addr);
 		break;
 
 	case I2C_SMBUS_BLOCK_DATA:
 		byte_cnt = read ? I2C_SMBUS_BLOCK_MAX : data->block[0];
 		mlxbf_i2c_smbus_block_func(&request, &command, data->block,
 					   &byte_cnt, read, pec);
 		dev_dbg(&adap->dev, "smbus %s block data, %d bytes at 0x%02x, slave 0x%02x.\n",
-			read ? "read" : "write", byte_cnt, command, addr);
+			str_read_write(read), byte_cnt, command, addr);
 		break;
 
 	case I2C_FUNC_SMBUS_PROC_CALL: