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This patch added support for IS25WP020, IS25WP040, and IS25WP080 SPI flash chips. The datasheet for these chips can be found at: https://www.issi.com/WW/pdf/25WP016_080_040_020.pdf Tested read, write, and erase functions on IS25WP080. Test log: Write: https://paste.flashrom.org/view.php?id=3698 Write test 2: https://paste.flashrom.org/view.php?id=3699 Erase: https://paste.flashrom.org/view.php?id=3700 Change-Id: I8a786de5cf9ffefb2d57f89bbab71e289b5c2b28 Signed-off-by: Ao Zhong <hacc1225@gmail.com> Reviewed-on: https://review.coreboot.org/c/flashrom/+/75830 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>