Fix typo in SMBus Write Word Data description (write data, dont read it).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/Documentation/i2c/smbus-protocol b/Documentation/i2c/smbus-protocol
index 09f5e5c..3baedec 100644
--- a/Documentation/i2c/smbus-protocol
+++ b/Documentation/i2c/smbus-protocol
@@ -97,7 +97,7 @@ SMBus Write Word Data
 =====================
 
 This is the opposite operation of the Read Word Data command. 16 bits
-of data is read from a device, from a designated register that is 
+of data is written to a device to the designated register that is 
 specified through the Comm byte. 
 
 S Addr Wr [A] Comm [A] DataLow [A] DataHigh [A] P