sf: Fix S25FL116K entry

The flash chip is 2 MiB , organized as 32 x 64 kiB sectors .
Rectify the entry to match the datasheet, reality and Linux SNOR IDs.

Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Jagan Teki <jagan@openedev.com>