docs: i2c: writing-clients: properly name the stop condition

In I2C there is no such thing as a "stop bit". Use the proper naming: "stop
condition".

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Reported-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

Documentation/i2c/writing-clients.rst

@@ -357,9 +357,9 @@ read/written.
 
 This sends a series of messages. Each message can be a read or write,
 and they can be mixed in any way. The transactions are combined: no
-stop bit is sent between transaction. The i2c_msg structure contains
-for each message the client address, the number of bytes of the message
-and the message data itself.
+stop condition is issued between transaction. The i2c_msg structure
+contains for each message the client address, the number of bytes of the
+message and the message data itself.
 
 You can read the file ``i2c-protocol`` for more information about the
 actual I2C protocol.