pinctrl: cherryview: Fix spelling mistake in the comment

One spelling mistake is being fixed: benerate -> generate.
It is a complimentary fix to the commit 505485a8 ("pinctrl:
cherryview fixed typo in comment").

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>