mtd: spi-nor: winbond: Update w25q256fw flash memory to use 4B opcodes

commit c8d6f9752fb319baf55bcad16014f54bd8bb4799 from
git@git.assembla.com:cavium/WindRiver.linux.git

Linux should use 4B opcodes so that flash address mode is not
altered which helps to avoid issues and use unified address mode
across firmware and Linux.

Change-Id: I3fe7fe7e91ef46186520de65f94446183b40fdd5
Signed-off-by: Witold Sadowski <wsadowski@marvell.com>
Signed-off-by: Suneel Garapati <sgarapati@marvell.com>
Reviewed-on: https://sj1git1.cavium.com/c/IP/SW/kernel/linux/+/120907
Tested-by: sa_ip-sw-jenkins <sa_ip-sw-jenkins@marvell.com>
Reviewed-by: Chandrakala Chavva <cchavva@marvell.com>
Signed-off-by: Ruiqiang Hao <Ruiqiang.Hao@windriver.com>