staging:iio: fix typo

Signed-off-by: NMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/iio_core.h

@@ -6,7 +6,7 @@
  * under the terms of the GNU General Public License version 2 as published by
  * the Free Software Foundation.
  *
- * These definitions are meant for use only within the IIO core, not indvidual
+ * These definitions are meant for use only within the IIO core, not individual
  * drivers.
  */