OneNAND: Remove unused parameters to onenand_verify_page

The block and page parameters of onenand_verify_page() are not used. This causes a compiler error when CONFIG_MTD_ONENAND_VERIFY_WRITE is enabled.

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Dirk Behme <dirk.behme@gmail.com>