i2c: Add/update utility inline functions

- Change the argument for i2c_is_read_op to a const pointer
- Add function i2c_is_stop_op to test if a message has a stop flag.

Signed-off-by: Yuval Peress <peress@google.com>

Author: yperess

include/zephyr/drivers/i2c.h

@@ -474,14 +474,26 @@ static inline bool i2c_is_ready_dt(const struct i2c_dt_spec *spec)
  * @brief Check if the current message is a read operation
  *
  * @param msg The message to check
- * @return true if the I2C message is sa read operation
+ * @return true if the I2C message is a read operation
  * @return false if the I2C message is a write operation
  */
-static inline bool i2c_is_read_op(struct i2c_msg *msg)
+static inline bool i2c_is_read_op(const struct i2c_msg *msg)
 {
 	return (msg->flags & I2C_MSG_READ) == I2C_MSG_READ;
 }
 
+/**
+ * @brief Check if the current message includes a stop.
+ *
+ * @param msg The message to check
+ * @return true if the I2C message includes a stop
+ * @return false if the I2C message includes a stop
+ */
+static inline bool i2c_is_stop_op(const struct i2c_msg *msg)
+{
+	return (msg->flags & I2C_MSG_STOP) == I2C_MSG_STOP;
+}
+
 /**
  * @brief Dump out an I2C message
  *