sf: sf_params: Add S25FL164K flash identifier info

Add the necessary flash entry for the Spansion S25FL164K
flash. Tested on Marvell 88F6218 based design.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>