flashchips: Add ISSI IS25WP064 and IS25WP032

The IS25WP064 was tested successfully by Simon Buhrow as reported on
2018-9-4. While we are at it, also add the 32Mbit version which shares
the datasheet (as does the already supported 128Mbit version).

Change-Id: Ie0887b4ae6e6465118a5dc2e20b784f783d161b8
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/28884
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
2 files changed