This patch backports the upstream patch that adds the 4B_OPCODES flag to w25q256 under 4.19 kernel.
This is needed for ipq40xx and ramips.
Signed-off-by: Robert Marko <robimarko@gmail.com>
XTX XT25F128A shares it's chip ID with XM25QH128A which got identical
features. Hence there it makes no sense to add it to the driver.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>