mtd: spi-nor: macronix: Drop the redundant flash info fields

Many flash devices share the same ID but have different part numbers.
To avoid confusion, the part number field is removed.

Additionally, since SFDP already provides size information and
functionality covered by no_sfdp_flags, these fields are also removed.

Furthermore, when 4-byte address instruction table is available,
the SPI_NOR_4B_OPCODES flag is no longer needed and is removed.

Signed-off-by: Cheng Ming Lin <chengminglin@mxic.com.tw>
Acked-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Signed-off-by: Pratyush Yadav <pratyush@kernel.org>
Link: https://lore.kernel.org/r/20250407075400.1113177-2-linchengming884@gmail.com