doc: i2o: fix typo 'Settting'

The below patch fixes a typo "Settting" to "Setting".
Signed-off-by: NJustin P. Mattock <justinmattock@gmail.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Documentation/i2o/ioctl

@@ -110,7 +110,7 @@ V. Getting Logical Configuration Table
       ENOBUFS     Buffer not large enough.  If this occurs, the required
                   buffer length is written into *(lct->reslen)
 
-VI. Settting Parameters
+VI. Setting Parameters
 
    SYNOPSIS