char/ipmi: fix spelling mistake "receieved_messages" -> "received_messages"

There is a spelling mistake in the documentation. Fix it.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Message-Id: <20190418101502.9748-1-colin.king@canonical.com>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Corey Minyard <cminyard@mvista.com>

Documentation/ABI/testing/sysfs-devices-platform-ipmi

@@ -212,7 +212,7 @@ Description:
 					Messages may be broken into parts if
 					they are long.
 
-		receieved_messages:	(RO) Number of message responses
+		received_messages:	(RO) Number of message responses
 					received.
 
 		received_message_parts: (RO) Number of message fragments