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[ Upstream commita45ab839f5] Infineon SEMPER flash family does not support E9h opcode as Exit 4-byte mode (EX4B). Therefore, params->set_4byte_addr_mode is not determined by BFPT parse. Fixup it up by introducing vendor specific EX4B opcode (B8h) and function. Fixes:c87c9b11c5("mtd: spi-nor: spansion: Determine current address mode") Signed-off-by: Takahiro Kuwano <Takahiro.Kuwano@infineon.com> Acked-by: Tudor Ambarus <tudor.ambarus@linaro.org> Acked-by: Pratyush Yadav <pratyush@kernel.org> Signed-off-by: Pratyush Yadav <pratyush@kernel.org> Link: https://lore.kernel.org/r/20250612074427.22263-1-Takahiro.Kuwano@infineon.com Signed-off-by: Sasha Levin <sashal@kernel.org>